FCC ID: 2A9GKSKBPSAEB01KR Zero Earbuds

Zero Earbuds Product overview and operation manual O Overview Zero Earbuds is a wearable device for measuring multiple biosignals. It is connected to a smartphone or tablet PC by wireless and can measure 4-channel EEG, 1-channel ECG, and 1-channel angular velocity using the dedicated APP. O Signal processing module Integrated signal processing board :

EEG module, ECG module, Gyroscope sensor O Appearance Overview Device Cradle Internal board Internal board O Specification Charging Voltage and current Operating Voltage Operation Temp. Frequency Size Weight Device Cradle Device Cradle 5Vdc 300mA 3.7Vdc 10 ~ 40 2402 ~ 2480 MHz 67.1 * 47 * 14.2 (), cable 285mm 186.7 * 68.8 * 41.2 33g 210g O Operation 1. Attach the electrode to the device. 2. Turn on the switch on the right side device. If device turn on, the Blue LED blink. 3. Open the ST BLE Demoapplication on the smartphone. 4. Select the EEGS1V1, and click CONNECTbutton. 5. Slide the P2P Notify slider, and the received data will display. If the application works properly, the characters are scrolled on the screen as shown below. 6. Scrolling may be interrupted by temporary disconnection caused by external shock, but scrolling is restored soon, and this is a normal operation. 7. Exit the application for ending test. FCC Compliance Statement 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 device must accept any interference received, including interference that may cause undesired operation. FCC Interference Statement 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 instructions, may cause harmful interference to radio communications. 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 off and on, the user is encouraged to correct the interference by one 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 different from which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. FCC Caution Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

ZERO Earbuds Case (Bottom) SK Biopharmaceuticals ZERO Earbuds Model SKBP-SA-EB-01-KR Made in Korea ZERO Earbuds Main Body (Right Rear) 5mm FCC ID : 2A9GKSKBPSAEB01KR

SK biopharmaceuticals Co.,Ltd. 8th Floor, 221, Pangyoyeok-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea Date: December 29, 2022 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern:

We, the undersigned, hereby authorize Ms. Lena Lim/Assistant Manager of Eurofins KCTL Co.,Ltd. to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Raeeun Chung / Associate manager

SK biopharmaceuticals Co.,Ltd. Date: March 22, 2023 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for 2A9GKSKBPSAEB01KR

[SK biopharmaceuticals Co.,Ltd.] (the applicant) certifies that the equipment for which authorization is sought is not covered equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Sincerely,

(Applicant signature)

(Applicant printed name) Raeeun Chung SK biopharmaceuticals Co.,Ltd. Date: March 22, 2023 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for 2A9GKSKBPSAEB01KR

[SK biopharmaceuticals Co.,Ltd.] (the applicant) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing covered equipment. Sincerely,

(Applicant signature)

(Applicant printed name) Raeeun Chung

SK biopharmaceuticals Co.,Ltd. 8th Floor, 221, Pangyoyeok-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea Date: December 29, 2022 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR Zero Earbuds / SKBP-SA-EB-01-KR /

2A9GKSKBPSAEB01KR To Whom It May Concern:

This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the (below list) required to be submitted with this application be permanently withheld from public review. Permanent Confidential Request

-. Schematics

-. Operational Description

-. Block Diagram SPECIFY REASON FOR REQUEST (i.e. the above documents are company proprietary information that could never get into the possession of your competition). Please contact me if there is any information you may need. Sincerely, Raeeun Chung / Associate manager

SK biopharmaceuticals Co.,Ltd. 8th Floor, 221, Pangyoyeok-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea Date: December 29, 2022 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR Zero Earbuds / SKBP-SA-EB-01-KR /

2A9GKSKBPSAEB01KR To Whom It May Concern:

This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the (below list) required to be submitted with this application be short-term Confidentiality for a period of 180 days after grant is issued. Short-Term Confidential Request

-. External Photos

-. Internal Photos

-. Test set-up photo

-. User Manual SPECIFY REASON FOR REQUEST (i.e. These documents contain detailed system and equipment descriptions and related information about the product, which we considers to be proprietary, confidential, and a custom design and otherwise, would not release to the general public. Since this design is a basis from which future technological products will evolve, we feel that this information would be of benefit to our competitors, and that the disclosure of the information in these documents would give our competitors an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Raeeun Chung / Associate manager

Attestation Statements Date: March 22, 2023 TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for 2A9GKSKBPSAEB01KR SK biopharmaceuticals Co.,Ltd. the undersigned, hereby authorize Americas Compliance Consulting LLC dba iCertifi to act as our designated U.S. agent for service of process, SK biopharmaceuticals Co.,Ltd. accepts 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. Americas Compliance Consulting LLC dba iCertifi accepts the responsibility to act as designated U.S. agent for service of process, provides 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. Applicant Information Company name: SK biopharmaceuticals Co.,Ltd. Contact Name: Raeeun Chung Address: 8th Floor, 221, Pangyoyeok-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea Telephone No: +82-10-9787-5134 Email: raeeun.chung@sk.com U.S. Agent Information:

Company Name:

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Americas Compliance Consulting LLC dba iCertifi 1001 SW Disk Drive, Suite 250, Bend, Oregon 97702 USA. Paul Preston

+1 866-885-4575 fccagent@icertifi.com 0033399411 Applicant Signature: Agent Signature:

Applicant printed name: Raeeun Chung Agent printed name: Paul Preston