FCC ID: 2AHYINIRSITB NIRSIT

Using the NIRSIT Software 4.9 Using the Software in Quick Mode In Quick Mode, the NIRSIT software monitors the subjects cerebral oxygen saturation

(rSO2) without an active account. In Quick Mode, rSO2 values are displayed in numeric format and graphical format in real time. To use NIRSIT in Quick Mode, select MENU BAR > SETTINGS and set Quick Mode to On. 4.9.1 Real-time Monitoring On the START TO MEASURE screen, select GO. 47 4.9.2 Quick Mode Screen Overview Using the NIRSIT Software No. Description 1 2 3 4 5 6 7 8 9 EVENT items selected from MENU BAR > SETTINGS > Events will be displayed in the EVENT list below. (see 4.7 Configuring Initial NIRSIT Settings) Items pre-defined in EVENT and Setting are shown. Mark an event by selecting on the Event. The selected event marker is displayed on the corresponding time axis in graph format. During initialization (for 30 seconds) after the start of the measurement, the box maintains a green background and the values are displayed as --. The background becomes red during measurement if measurement results are deemed incorrect. This may occur when the device is put on the subject incorrectly or the device is exposed to a bright sunlight. The measurement date and duration are displayed. BASE LINE setting button Set values obtained by selecting the basic-value setting (BASELINE) button as basic values. Variations between the current values and the reference values are shown (blue indicates a decrease while red indicates an increase). Left and Right oxygen saturation values (rSO2) are shown. Set the alarm on or off, according to the alarm conditions specified in initial settings. 10 Left and right measurements are displayed in graph format, where x axis denotes measurement time period in minutes. Selected events are displayed with green markers). 48 Using the NIRSIT Software 4.10 Saving Data Save measurement data. 1 After the measurement is complete, either in Quick Mode or Normal Mode, select DONE at the bottom of the screen. A window will pop up asking if you want to finish measurement. NOTE To automatically save measurement data and display the main screen for the current mode, select DONE. Make sure that Auto Save is set to On in MENU BAR > SETTINGS. 2 Select DONE. The measurement stops and a pop-up window appears asking if you want to save the data. 3 Select YES. The data is automatically saved and the device displays the main screen in the current mode. 49 Using the NIRSIT Software 4.11 Playing Back Saved Data 1 At the top of the screen, select MENU BAR > DATA. To play data, you must confirm the password for the logged-in observer account. 2 Enter the password for the logged-in observer account, and then select DONE at the bottom of the screen. Select the data item to play. The selected data will be played. Data list is sorted by the subject name and measurement date. Select whether to apply additional functions, used during measurement, according to the Replay option setting (On/Off) under MENU BAR > SETTINGS. See 4.7 Configuring Initial NIRSIT Settings for details. 50 Using the NIRSIT Software M next to the subject name denotes MONITORING Mode Data NOTE B next to the subject name denotes TASK Mode > BEHAVIORAL Task Data C next to the subject name denotes TASK Mode > COGNITIVE Task 4.11.1 Adding Notes can be added to saved data. 1 Select the icon next to the measurement data item and add any information to identify the measurement data. Select DONE when complete. 4.11.2 Exporting Saved data can be exported as a file for further analysis. Exported files are saved in the tablet My Files > Device Storage > NIRS folder > nirsit_export.db. The nirsit_export.db file can be converted to .csv format. See 8.2 Using the NIRSIT DB Browser for details. 1 Press and hold the measurement data item file name to export. The data item will be selected and a red vertical line will appear at the left corner of the selected data item. 2 Use the same method in step 1 to select as many data items as you want to export. To select all items, select the checkbox () in the top left of the SAVED DATA screen. 51 Using the NIRSIT Software 3 Select EXPORT at the bottom of the screen. 4.11.3 Deleting Saved data can be deleted. 1 Press and hold the measurement data item to delete. The data item will be selected. 2 Use the same method in step 1 to select as many data items as you want to delete. To select all items, select the checkbox () in the top left of the SAVED DATA screen. 3 Select DELETE at the bottom of the screen. 52 Using the NIRSIT Software 4.12 Edit Subject 4.12.1 Editing the subject 1 Select MENU BAR >EDIT SUBJECT. 2 Enter the password for the logged in observer account and select DONE. 3 Select the subject name. 4 Edit their information on the QUESTIONNAIRE window. 5 After editing the information, select DONE. 53 Using the NIRSIT Software 4.12.2 Deleting the subject(s) 1 Select MENU BAR >EDIT SUBJECT. 2 Enter the password for the logged in observer account and select DONE. 3 To delete one of the subject, select and hold the desired subject name until the red vertical line is displayed in front of the subject name. To delete multiple subjects First select and hold one of the subject name until the red vertical line is displayed in front of the subject name. And then select any other desired subject name(s). 54 Using the NIRSIT Software To delete all the subjects Select and hold one of the subject name. And then check the check box () on the left of the EDIT SUBJECT window. 4 After selecting the subject name, select DELETE at the bottom of the screen. 5 The massage Do you want to delete? appears. To delete it, select CONFIRM. To cancel, select CANCEL. NOTE To deselect a subject, select the subject name again and the red vertical line on the left will disappear. To deselect all the subjects, press back button (

) on the tablet itself. 55 Using the NIRSIT Software 4.12.3 Searching the subject 1 Select MENU BAR >EDIT SUBJECT. 2 Enter the password for the logged in observer account and select DONE. 3 Select SEARCH at the bottom of the screen. 4 Enter the subject name (regardless of last name or first name). 4.13 Checking and Updating the Software Version Select MENU BAR > VERSION. Use the VERSION screen to view the latest updated versions for NIRSIT-EYE and NIRSIT-FIRMWARE. If the current version is not the latest, use the Update button to update. NIRSIT-EYE can only be updated when the device is connected. 56 Maintenance 5. Maintenance 5.1 Replacing Accessories and Components 5.1.1 Replacing Straps Replace with a new strap if the current strap is dirty, damaged or feels loose. A strap can be removed by following the installation instructions in reverse order. 5.1.2 Replacing the Disposable Patch (sold separately) Disposable patches are for single use only. Replace the patch after each use to ensure proper hygiene. To purchase accessories, please contact OBELAB or an authorized dealer. 1 Remove the used disposable patch. 2 Attach a new disposable patch on the sensor unit inside the device by aligning the holes. 3 Press all the sensors to ensure that the disposable patch is securely attached to the sensors. 5.2 Cleaning Make sure to turn off the NIRSIT device before cleaning. The device must be cleaned and stored after use. If not properly cleaned, or if exposed to direct sunlight, the device may become discolored. 5.2.1 Cleaning Silicon Caps Wipe with an alcohol-moistened soft cloth. Silicon caps are frequently in contact with subjects. Take extra care to maintain hygiene. 5.2.2 Cleaning NIRSIT 1 Wipe with a soft cloth moistened with a non-abrasive cleaning solution mixed with water. Make sure that liquid does not enter the device. This can cause device failure. WARNING Do not spray directly on the device. Do not use abrasive agents e.g. acetone as they can damage the surface. 2 Use a dry cloth to wipe off the moisture. 3 To remove foreign objects from the sensor, use a cotton ball soaked with alcohol. NOTE NIRSIT can be sterilized with ultraviolet rays. 57 Maintenance 58 Troubleshooting 6. Troubleshooting Symptoms Possible cause Solution The device will not turn on. The battery is discharged. Charge the battery The battery has expired. Contact OBELAB or an authorized dealer. The battery will not charge. The cable is damaged or severed. Cannot connect with the tablet. This environment is not suitable to store or operate the product. The Wi-Fi feature is turned off. Sometimes a wireless connection cannot be established due to environmental factors (e.g. congested area such as a big event venue). If you have a spare, replace the cable. If you do not have a spare, purchase a new cable. Meet environmental requirements. Turn on the tablet Wi-Fi. Use a USB cable for a wired connection. NOTE Information related to after-sales services and other technical information on the device can be found in the service manual provided by OBELAB. 59 Troubleshooting 60 Product Specifications 7. Product Specifications 7.1 Mechanical Characteristics Item Description Size (Width x Depth x Height) 215 x 195 x 75 (mm) Weight (including battery) 500 g 7.2 Technical Characteristics Item Description Source Type Dual wavelength VCSEL laser Number of Sources Source Laser Output 24 1 mW Wavelength 780 nm, 850 nm Operation Mode CW Detector Type Active detection sensor Detector Number of Detectors 32 Number of channels Up to 204 channels Source-Detector distance 1.5 cm, 2.12 cm, 3 cm, 3.35 cm Measurement System Scan Rate Up to 8.138 Hz Operation Mode CW 7.3 Electrical Characteristics Item Description Input Voltage (via USB port) Maximum Current (via USB port) 5 V 2.1 A Type Lithium ion polymer battery Usage Time Up to 8 hours (when fully charged) Battery Voltage Capacity 3.7 V 3000 mAh Data Storage Built-in memory in Tablet or PC storage Communication Wireless WLAN (2.4 GHz 802.11b/g/n) 61 Product Specifications Item Wired Description Serial Communication 7.4 Tablet Requirements Item Description Operating System Android 5.0(Lollipop) or higher CPU RAM Internal Memory Resolution Camera QuadCore or higher 3 GB or greater 32 G or greater 16:9 UI supported 8MP or higher NOTE The provided tablet is to be used only with NIRSIT. Do not use this tablet for other purposes. Please do not install other apps. Other apps may disrupt NIRSIT performance. 7.5 Environmental Requirements Operating Environment Storage Environment Item Temperature Humidity Temperature Humidity Description 15C ~ 35 (For CE -20 C C ~

50C) 20% ~ 80%

-10C ~ 40C 20% ~ 80%

62 Appendix 8. Appendix 8.1 Guidance and Manufacturers Declaration 8.1.1 Guidance and Manufacturers Declaration Electromagnetic Emissions This system is intended for use in the electromagnetic environment specified below. The customer or user of the system should ensure that it is used in such an environment. Emissions test Compliance Electromagnetic environment - guidance RF emission CISPR 11 RF emission CISPR 11 Harmonic emissions IEC 61000-3-2 Voltage fluctuations

/ Flicker emissions IEC 61000-3-3 Group 1 Class A N/A N/A This system uses RF energy only for its internal functions. Therefore, its RF emissions are very low and are not likely to cause any interference in nearby electronic equipment. This system is suitable for use in all establishments other than domestic establishments and those directly connected to the public low-voltage power supply network. NOTE The use of cables and components other than those specified for this system is not recommended. Using cables or components that do not meet the system specifications may affect emission quality. 63 Appendix 8.1.2 Guidance and Manufacturers Declaration Electronmagnetic Immunity This system is intended for use in the electromagnetic environment specified below. The customer or user of the system should ensure that it is used in such an environment. Immunity test Compliance level Electromagnetic environment - guidance Electrostatic discharge

(ESD) IEC 61000-4-2 6 kV contact 8 kV air The floors should be wood, concrete or ceramic tile. If floors are covered with synthetic material, the relative humidity should be at least 30%. NOTE 1. UT is the AC mains voltage prior to application of the test level. 2. The use of cables and components other than those specified for the current system is not recommended. Using cables or components other than those specified for the current system may affect the immunity 64 Appendix 8.1.3 Guidance and Manufacturers Declaration Electronmagnetic Immunity Equipment & Systems that are NOT life supporting This system is intended for use in the electromagnetic environment specified below. The customer or user of the system should ensure that it is used in such an environment. Immunity test Compliance level Electromagnetic environment - guidance Radiated RF IEC 61000-4-3 3 V/m 80 MHz - 800 MHz: d = 1.2 800 MHz - 2.5 GHz: d = 2.3 where P is the maximum output power rating of the transmitter in watts (W) and d is the recommended separation distance in meters (m), based on the transmitter manufacturer's standard. Field strengths from fixed RF transmitters, as determined by an electromagnetic site surveya, should be less than the compliance level in each frequency rangeb. Interference may occur in the vicinity of equipment marked with the following symbol:

1. At 80 MHz and 800 MHz, the higher frequency range applies. 2. These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects, and people. NOTE 3. The use of cables and components other than those specified for the system is not recommended. This may result in decreased electromagnetic immunity of the system. Field strengths from fixed transmitters, such as base stations for radio

(cellular/cordless) telephones and land mobile radios, amateur radio, AM and FM radio broadcast, and TV broadcast, cannot be predicted theoretically with any degree of accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the location in which the system is used exceeds the applicable RF compliance level above, the system should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the system. Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m. a b 65 Appendix 8.1.4 Recommended separation distances between portable and mobile RF communications equipment and the system For systems that are not NOT life supporting This system is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or user of the system can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the system as recommended below, according to the maximum output power of the communications equipment. Rated max. output power of transmitter (W) Separation distance according to frequency of transmitter (m) 150 kHz - 80 MHz 80 MHz - 800 MHz 800 MHz - 2.5 GHz d = 1.2 P d = 1.2 P d = 2.3 P 0.01 0.1 1 10 100 0.12 0.38 1.2 3.8 12 0.12 0.38 1.2 3.8 12 0.23 0.73 2.3 7.3 23 For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (m) can be estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer's standard. 66 Appendix 8.1.5 Guidance and Manufacturers Declaration Specific Absorption Rate

(SAR) The product's specific absorption rate (SAR), which measures the amount of electromagnetic waves absorbed by the human body, satisfies the "Electromagnetic Wave Protection Standards" set by the Ministry of Science and ICT. The product was tested according to the "SAR Measurement Standards" of the National Radio Research Agency, with the maximum output condition and in proximity to the head. The maximum SAR measurement value for the head absorption rate at 2.4 GHz WLAN frequency is as follows:

Model Name Head SAR (2.4 WLAN) NS1-H20B Location: Rear#1 (right contact position) / Mid Ch. (2442.0 MHz) SAR: 0.259 W/kg (Grade 1) In South Korea, the SAR (Specific Absorption Rate) is regulated to a stricter standard of 1.6 W/kg, which is lower than the international recommended standard of 2 W/kg It is important to note that in everyday use, the actual SAR is significantly lower than the maximum output condition during testing. More detailed information about SAR can be found on the website of the National Radio Research Agency (www.rra.go.kr) or the manufacturer's website 67 Appendix 8.2 Using the NIRSIT DB Browser NIRSIT DB Browser is a computer-based application designed to view data in the nirsit_export.db file, sent from NIRSIT, on your computer. You can also convert the file to CSV format for use as material for research on cerebral activity. On the computer desktop, double-

click the application icon to launch NIRSIT DB Browser. 8.2.1 Loading the Database File 1 Click the Load button. 2 Move to the directory where the nirsit_export.db file is located, select the file, and then click Open (O). 3 In the Selected Data area, click the desired data item. Specific information appears on the right. 8.2.2 Converting to CSV Format Click Convert to CSV. Convert the nirsit_export.db file to CSV format. NOTE The converted file can be found in the same folder as the database file. 68 Appendix 69 Appendix 70 Appendix 71 Appendix 72

Certification designating a U.S. Agent for service of process:

As required by section 2.911(d)(7), the applicant must designate a contact located in the United States for purposes of acting as the applicants agent for service of process, regardless of whether the applicant is a domestic or foreign entity. An applicant located in the United States may designate itself as the agent for service of process. In either scenario, the designation of the U.S. agent for service of process should be provided as an attachment to the equipment authorization application. The applicant must provide a written certification, which must:

i. Be signed by both the applicant and designated agent for service of process, if the agent is different from the applicant. ii. Acknowledge the applicants consent and the designated agents obligation to accept service of process. iii. Provide a physical U.S. address and email for the designated agent. iv. Acknowledge the applicants acceptance to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Unofficial information provided by FCC personnel on February 14, 2023, via the monthly call with the TCB Council:

The Agent for Process of Service:

cannot be a TCB or affiliated with a TCB (e.g. could not be a person who works for a TCB or a company that owns or is owned by the TCB) cannot be a [FCC recognised] Lab or affiliated with a test lab (e.g. could not be a person who works for a Lab or a company that owns or is owned by the Lab) Agent can be Individual Entity or a Company Entity Agent Entity must be located in US, US address/phone Entity acting as Agent must have FRN (best practice, put FRN on Agent Letter) Agent letter does not have to be FCC ID specific, can be general Agent for Grantee For devices being marketed or for which marketing has ceased for less than 1 year, if the Agent for Process of Service changes, then for every TC Number the TCB must request the FCC to put application into Audit Mode and Agent Letter needs to be updated (superseded). NOTE: The U.S. Agent for Service of Process should not be confused with the authorized agent used for signing the 731 form, other cover letters within the application, and/or the agent who may interface with the TCB. OBELAB, Inc. 12F Vision Tower, 312, Teheran-ro, Gangnam-gu, Seoul, South Korea U.S. Agent Designation for Service of Process ATTENTION:

Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA REGARDING: FCC Certification Section 2.911(d)(7) Information Designated U.S. Agent Company Name: Approve-IT, Inc. Contact Name: Nathan Grinager Street Address: 8011 34th Ave South, Suite 342 City/Province/Zip: Bloomington, MN 55425 Telephone No: 651-247-1678 Email: team@approve-it.net FRN #: 0027533835 This letter is to confirm that we (the Designated U.S. Agent) have accepted the responsibility to act as the Designated U.S. Agent for Service of Process as required by section 47 CFR 2.911(d)(7) on behalf of the Applicant noted below. U.S. Agent Signature:

Date: July 10, 2023 Signed by (Printed Name/Title): Nathan Grinager / Co-President

*This letter is valid indefinitely for all applications submitted within the period of 07/10/2023 07/10/2024. The Applicant confirms its explicit consent and acknowledges that they must maintain an agent for no less than one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information above changes. Applicant Company name: OBELAB, Inc. Grantee Code: 2AHYI FCC ID: NIRSITB Contact Name: Jiwook Kim Street Address: 12F Vision Tower, 312, Teheran-ro, Gangnam-gu, Seoul, South Korea City/Province/Zip:

Telephone No: +82-2-6407-4974 Email: jwkim@obelab.com Applicant Signature:

Date: 07/10/2023 Signed by (Printed Name/Title) Jiwook Kim / Quality Manager

OBELAB, Inc. 12F Vision Tower, 312, Teheran-ro, Gangnam-gu, Seoul, South Korea Date: 07/11/2023 Federal Communications Commission Authorization and Evaluation Division 1435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2AHYINIRSITB To Whom It may Concern:

Request of Confidentiality Pursuant to Sections 0.457 and 0.459 of the Commission`s Rules(CFR 47), and Section 552 (b) (4) of the Freedom of Information Act, OBELAB, Inc. hereby requests confidentiality and treatment of certain information accompanying this application. The materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the Applicant and provide unjustified benefits to its competitors. We are also hereby request Short-Term Confidentiality for 180 days after the grant as outlined in Public Notice DA 04-1705. This provision will give OBELAB, Inc. temporary confidentiality of commercially sensitive information prior to product release. The requested permanent and Short-Term Confidential exhibits are listed as follows:

PERMANENT & SHORT-TERM CONFIDENTIAL LIST PERMANENT SHORT-TERM Description Exhibit 1 2 3 4 5 6 7 8 9 Block Diagram Schematics Part Lists Operation Description NA Internal Photos External Photos Test-Setup Photos User Manual The Applicant understands that pursuant to Rule 0.457, disclosure of this application and all accompanying documentations, where applicable, will not be public before the date of the Grant for this application. Sincerely, Contact Name: Jiwook Kim Title: Quality Manager