FCC ID: 2AXY8-BULO-H01 A smart machine that uses BLE to measure lung capactiy

Charging USB Cable Instructions Manual Charging Red Table of Contents 1. Safety Precautions 1. Safety Precautions 1. Safety Precautions 2. Introduction to BULO 2. Introduction to BULO Storage Use Use Product Contents Details on the LED Signal Light 1. Safety Precautions Storage Use 2. Introduction to BULO Product Contents List of Parts Details on the LED Signal Light 3. Instructions to Features Turning on the Device Connecting the Bluetooth Charging 4. Information for Optimum Use 5. Troubleshooting 6. Product Specications 7. Product Storage and Maintenance Transport Cleanliness Mouthpiece Usage Period 3 6 8 9 10 12 13 1. Avoid direct sunlight or areas close to heating devices. Do not store or use near ammable spray or other ammable objects. There is a danger of an explosion or re. 2. Do not place heavy objects on top of the product. There is a danger of an explosion or re. 3. When charging the product, please avoid plugging it into an outlet that already has multiple electronics plugged in. There is a danger of an explosion or re. 4. When charging the product, install the product in an area where the plug can be operated easily. There is a danger of an explosion or re. 5. For optimum performance, avoid storage in areas with radiation. 6. After each use, place the product in the enclosed pouch and store away from direct sunlight. Foreign substances can cause malfunctions. Turning on the Device Press the button once to turn on the device. Connecting the Bluetooth 1. Make sure that the device is turned on. 2. Install the correlated smartphone app. 3. Follow the smartphone app instructions and press the button once to connect. 4. When connected, the LED signal light will turn blue.

(The details of the LED signal light are included in the section Introduction to BULO) Charging 1. Connect enclosed USB charging cable to the C-Type charging port on the device to charge it. 2. The LED signal light will turn on when connection is successful.

(The details of the charging status are included in the explanation about the LED signal light under the Introduction to BULO) 3. When done charging, separate the USB charging cable and device and store each in the optimum fashion. 2. Use after checking that the mouthpiece and device are properly assembled. 3. Use after checking the battery status.

(Battery status can be checked through the device or connected app with the touch of a button. If the device needs to be charged, the LED signal light will turn red. In this case, use the enclosed cable to charge the device.) 4. Use after separating the device from the USB charging cable. 5. Place the mouthpiece in the mouth during use to avoid wind caused by breathing. 6. After each use, place the device in the enclosed pouch and store away. 7. After disconnecting the bluetooth, the device will automatically turn o after a given time. 8. Do not move the device while charging. 1. Except for the mouthpiece, keep the product away from any contact with liquids. This is to avoid the possibility of res or electric shocks. 8. The charging cable must be removed from the product after charging. This is due to the possibility of res or electric shocks. 2. In case of smoke or strange smells, stop use of the product immediately. Quickly turn o the power and after separating from the charging cable, call the service center. This is to avoid the possibility of res or electric shocks. 9. Contact the service center when you have any complications or inquiries about the product. Customers will not receive any compensation if they attempted to disassemble or repair the product at their own discretion. 10. Only use the product in accordance with health maintenance. If the product is used for any purpose besides health maintenance, the company is not responsible for any damage, compensation or legal issues that may occur. 3. Separate product from charging cable when there is lightning and thunder. This is to avoid causing a re. 4. Do not use shortly after ingesting food or drink. May aect sensor performance. 5. Do not attempt to dismantle, repair or reconstruct the product. Fires, electric shock or injuries can be caused by malfunctions. 6. Do not heat, bend, twist, inscribe on or damage the charging cable in any way. This is to avoid the possibility of res or electric shocks caused by a damaged cable. 7. Handle and hold the charging cable only with dry hands. This is to avoid the possibility of electric shocks. Body Mouthpiece Enclosed Pouch List of Parts 4 1 2 3 LED Signal Light 2 Button 1 3 4 Removable Handle USB Charging Port 6 Issue Measure Issue Measure The device isnt turning on. Use the USB charging cable to charge the device. The device isnt operating well. The Bluetooth isnt connecting. Make sure that the smartphone can use Bluetooth. Use the device in a proper area that is not in polar extremities of temperature or humidity. Use the device indoors avoiding wind. Use the device in areas that cannot be reached by wind from fans, air conditioning, open windows or air puriers. Model Input Output Weight Dimensions

(W x H x D) BULO-H01 DC 5V, 2A 3.7V, 40mA 66g 140 x 45 x 37(mm) Materials PC/ABS, PP Communications Bluetooth 5 Battery Internal Li-PO Battery

(300mAh) Charging Type USB C-Type Range 10L/M ~ 840L/M Recommended Temperature 5 ~ 45 Restart the smartphones Bluetooth function and try connecting to the Bluetooth again. Restart the device and try connecting again. Clean up any possible obstructions between the smartphone and the device. Push the reset button

(small hole) located besides the serial number on the bottomof the device with a pin. The device isn't operating normally

* The Bluetooth may not connect well due to the surroundings and the type of Bluetooth device. 2 3 4 5 7 3. Instructions to Features 4. Information for Optimal Use 5. Troubleshooting 5. Troubleshooting Transport 6. Product Specications 7. Product Storage and Maintenance 1. Use after checking the connection status through the LED signal light. Before reporting a problem, please check the items listed below. Before reporting a problem, please check the items listed below. Charging complete Green Searching for Bluetooth device Flickering Blue Bluetooth connected Remaining battery Sensor error Blue Bright green /

Red (Under 20%) Power o after ickering red twice Transport Cleanliness 1. When the product is purchased, it will be placed in a packaging box and transported to the customer. 1. Use a non-abrasive lint-free dry cloth to clean the device. 2. Avoid using any liquid or chemical products when cleaning this device as doing so can result in deterioration or other complications. Only use dry cloths when cleaning. 3. The mouthpiece can be cleaned with water but avoid using any detergent, soap or other chemical products. 4. Boiling or hot water can cause deterioration or morphing so only use cold water to clean the mouthpiece. 5. Pay attention to avoid damaging the lter when cleaning the mouthpiece. Mouthpiece Usage Period 1. We recommend cleaning the mouthpiece and changing it regularly to maintain personal hygiene as the enclosed mouthpiece is only semi-permanent. 2. If the connecting portion of the mouthpiece is separated or the lter is damaged, foreign objects may enter the mouth during calibration. In this case, change to a new mouthpiece immediately. 3. To protect users from infections, we recommend keeping your mouth piece to yourself without sharing with others. 8 9 10 11 12 13 KC Certication Number : R-R-BRH-BULO FCC ID : 2AXY8-BULO-H01 FCC Compliance Statement

(for products subject to part 15) This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions :

(1) This device may not cause harmful interference, and (2) this de must accept any interference received, including interference that may cause undesired operation.

(Part 15 Subpart A, 15.21) The users manual or instruction manual for an intentional or unintentional radiator shall caution the user that changes or modications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

(Part 15 Subpart B, 15.105) NOTE : This equipment has been tested and found to comply with the limits for a Class B Digital Device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction, may cause harmful interference to radio communication. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception. Which can be determined by turning the equipment o and on, the user is encouraged to try to correct the interference by one or more of the following measures :

- Reorient or relocate the receiving antenna.

- Increase the separation between the equipment and receiver

- Connect the equipment into an outlet on a circuit dierent from that to which the receiver is connected.

- Consult the dealer or an experienced radio/TV technician for help. Address: #815 Gieobdosi-ro 200, Jijeong-myeon, Wonju-si, Gangwon-do, South Korea Telephone: (+82) 2-6085-1105 Homepage : https:// www.breathings.co.kr This product is a non-medical device and should be used appropriately. FCC ID is on the rear view of the body and it can be viewable by removing the mouthpiece without any tool. Instructions Manual

The Left side of device Label is located inside of the cover

BREATHINGS Co., Ltd. To : Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Class Il Permissive Change Request Letter Date:

SUBJECT: FCC Application for FCC ID:

To Whom It May Concern:

We are submitting an application for a Class Il Permissive Change to the FCC approval of:

Company name : BREATHINGS Co., Ltd. Product Description : Smart breathing exercise device FCC ID: 2AXY8-BULO-H01 Original Grant Date: 01/07/2021 The transmitter module itself has not changed. Here are the changes:

1. Several parts were discontinued and replaced with other compatible parts. 2. changed the power source circuit to enable all pin-to-pin compatible ICs. 3. Added standby power consumption rectifier cutoff circuit. Except for the change above, no other modification is performed. Also, the change dos not have any impact on the approved radio parameter such as power, frequency range, modulation etc. Sincerely, Client's signature:

Clients name & title: Kisang Yoon &

Contact information / address: evan@breathings.co.kr /

815, 200, Gieopdosi-ro, Jijeong-myeon, Wongu-si, Gangwon-do, Republic of Korea

BREATHINGS Co., Ltd. 815, 200, Gieopdosi-ro, Jijeong-myeon, Wongu-si, Gangwon-do, Republic of Korea Date: February 04, 2022 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 C.c. Timco Engineering Inc. 849 N.W. State Road 45 PO Box 370 Newberry, FL 32669 To whom it may concern:

I, the undersigned, hereby authorize Mr. Sung-Ryul Kim / Senior Researcher of Korea Testing Certification. and hereafter referred to as Korea Testing Certification to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. Any and all acts carried out by Ms. Sung-Ryul Kim / Senior Researcher of Korea Testing Certification. on our behalf shall have the same effect as acts of our own.

|, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853 (a). In authorizing Korea Testing Certification as our agent, we still recognize that we are responsible to:

a) comply with the relevant provisions of the certification program;

b) make all necessary arrangements for the conduct of the evaluation, including provision for examining documentation and access to all areas, records (including internal audit reports) and personnel for the purposes of evaluation (e.g. testing, inspection, assessment, surveillance, reassessment) and resolution of complaints;

c) make claims regarding certification only in respect of the scope for which certification has been granted;

d) do not use our product certification in such a manner as to bring the Certification Division into disrepute and not make any statement regarding our product certification which the Certification Division may consider misleading or unauthorized:

e) upon suspension or cancellation of certification, discontinue use of all advertising matter that contains any reference thereto and return any certification documents as required by the Certification Division;

f) use certification only to indicate the products are certified as being in conformity with specified standards;

g) endeavor to ensure that no certificate or report nor any part thereof is used in a misleading manner;

h) ensure that any reference to our product certification in communication media such as documents, brochures or advertising, complies with the requirements of the Certification Division;

i) keep a record of all complaints made known to the us relating to the products compliance with requirements of the relevant standard and to make these records available to the Certification Division when requested;

j) take appropriate action with respect to such complaints and any deficiencies found in products or services that affect compliance with the requirements for certification;

k) document the actions taken. This authorization is valid until further written notice from the applicant. Sincerely Yours, Kisang Yoon / Research Institute Director

BREATHINGS Co., Ltd. 815, 200, Gieopdosi-ro, Jijeong-myeon, Wongu-si, Gangwon-do, Republic of Korea Date: December 23, 2020 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 c.c. UL Verification Services Certification Division 47173 Benicia Street Fremont, CA 94538, USA To whom it may concern:

I, the undersigned, hereby authorize Ms. Lena Lim / Senior Staff of KCTL Inc. and hereafter referred to as KCTL to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. Any and all acts carried out by Ms. Lena Lim / Senior Staff of KCTL Inc. on our behalf shall have the same effect as acts of our own. I, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). In authorizing KCTL as our agent, we still recognize that we are responsible to:

a) b) c) d) comply with the relevant provisions of the certification program;

make all necessary arrangements for the conduct of the evaluation, including provision for examining documentation and access to all areas, records (including internal audit reports) and personnel for the purposes of evaluation (e.g. testing, inspection, assessment, surveillance, reassessment) and resolution of complaints;

make claims regarding certification only in respect of the scope for which certification has been granted;

do not use our product certification in such a manner as to bring the Certification Division into disrepute and not make any statement regarding our product certification which the Certification Division may consider misleading or unauthorized;

e) f) g) h) i) j) upon suspension or cancellation of certification, discontinue use of all advertising matter that contains any reference thereto and return any certification documents as required by the Certification Division;

use certification only to indicate the products are certified as being in conformity with specified standards;

endeavor to ensure that no certificate or report nor any part thereof is used in a misleading manner;

ensure that any reference to our product certification in communication media such as documents, brochures or advertising, complies with the requirements of the Certification Division;

keep a record of all complaints made known to the us relating to the products compliance with requirements of the relevant standard and to make these records available to the Certification Division when requested;

take appropriate action with respect to such complaints and any deficiencies found in products or services that affect compliance with the requirements for certification;

k) document the actions taken. This authorization is valid until further written notice from the applicant. Sincerely Yours, Kisang Yoon / Research Institute Director

BREATHINGS Co., Ltd. 815, 200, Gieopdosi-ro, Jijeong-myeon, Wongu-si, Gangwon-do, Republic of Korea CONFIDENTIALITY REQUEST Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21048 Date: December 23, 2020 TO WHOM IT MAY CONCERN Pursuant to Paragraphs 0.457 and 0.459 of the Commissions Rules (47 C.F.R.) and Section 552(b)(4) of the Freedom of Information Act, BREATHINGS Co., Ltd. requests confidentiality for the following products:

FCC ID Number Product Title/Model 2AXY8-BULO-H01 BULO/ BULO-H01 The following exhibits contain trade secrets and proprietary information that could be of benefit to our competitors regarding the design of our product. This material is not customarily available to the general public and we request that it be withheld from public inspection. We request that the following information submitted be held permanent confidential treatment. Permanent Confidential Request

-. Schematics

-. Block Diagram

-. Operational Description

-. Part lists

-. Antenna specification

-. External Photos

-. Internal Photos

-. Test set-up photo

-. User Manual We also hereby request Short-Term Confidentiality for 180 days after the grant as outlined in Public Notice DA 04-1705. This provision will give temporary confidentiality of commercially sensitive information prior to product release. Short-Term Confidential Request If you have any questions, please feel free to contact me at the address shown below. Sincerely, Kisang Yoon / Research Institute Director