FCC ID: 2AZ5T-PB002 PB-2 Button

1 Product Specification Product Name: PB-2 button Model Name: Time Drops PB-2 RevisionHistory Specification Rev Date Sect. Update Description 1.0 2021-02-01 New version release By WX Approvals Organization Name Title Date Table of Contents 1 1 Approvals ................................................................................................................................................................................................................................. 1 1.1 Description ............................................................................................................................................................................................................. 3 1.2 Application ............................................................................................................................................................................................................. 3 4.1 Performance ........................................................................................................................................................................................................... 4 5.1 Pairing and Unpairing ......................................................................................................................................................................................... 5 5.2 Indicator status......................................................................................................................................................................................................5 5.3 Button functions ................................................................................................................................................................................................... 5 5.4 OTA............................................................................................................................................................................................................................ 5 7.1 Gateway usage ...................................................................................................................................................................................................... 6 8.1 Lanyard.....................................................................................................................................................................................................................7 1.Introduction 1.1 Description Time Drops PB-2 is a portable wireless sports timing button. The product is developed based on Nordic's NRF52820 chip chip. It can be used with a proprietary gateway controller, and then can be used to measure elapsed time at sport competitions. 1.2 Application time measurement for sport competition (swimming) 2.Appearance ModelList Feature Mode Bluetooth Proprietary protocol Beep Installation Time Drops PB-2 N/A Lanyard 3.Hardwareblockdiagram Performance Time Drops PB-2 4.Productspecification 4.1 Performance Item Outline Size Net weight Main IC Protocol 41mm

~30g nRF52820 Proprietary Transmission frequency 2.400 - 2.4835GHz TX power

-20 ~ +8dBm, default 0dBm Receiving Sensibility

-103dBm Transmission distance 100~200meters(open area) Average power consumption

<65uA Working voltage:

2.2~3.6VDC Operation temperature

-10~65C Storage temperature

-30~85C Color white Built-in battery CR2032 180mAh Battery life IP protection Beep 2Years Depends on the mode of operation IP68 support Certification CE, FCC, IC, SAA 189A8 ,310004 Tel:86-571-86769027/8 Website: www.dusuniot.com 8810480 www.dusunremotes.com Floor 8, building A, Wantong center, Hangzhou 310004, china www.dusunlock.com 5.Function 5.1 Pairing and Unpairing 5.1.1 Pairing information is stored in the gateway controller only. 5.1.2 Press the button to power on the device 5.1.3 If the controller does not have pairing information, the device will not be bound and will flash rapidly for 30 seconds 5.1.4 After 30 seconds, the device will flash less rapidly for 150 seconds 5.1.5 During this time, the paring information can be sent to the gateway controller using the provided app 5.1.6 Once pairing is complete, the device will flash once per second 5.1.7 If no pairing information is received after 3 minutes, the device will power off 5.2 Indicator status Status Pairing mode Description LED flashing rapidly (> 1 Hz) Operating mode, connected to LED flashing at 1 Hz gateway controller 5.3 Button functions Button Action Description Short press the button once Trigger a time measurement for competitive sports. If in power off mode, turn on the device 5.4 OTA When the device is in the network state, the gateway or mobile APP issues an upgrade command to the device. 6.Caution 1. Being close to a metal object will interfere with the signal, causing the signal to be weaken. 2. Note the distance between Time Drops PB-2 and the receiver to guarantee the accuracy of receiving. 3. Keep away from the corrosive objects. 189A8 ,310004 Tel:86-571-86769027/8 Website: www.dusuniot.com 8810480 www.dusunremotes.com Floor 8, building A, Wantong center, Hangzhou 310004, china www.dusunlock.com 7.Referenceusage 7.1 Gateway usage 1) Time Drops PB-2 paired to the controller gateway using proprietary protocol 2) controller gateway communicates with the app using Wi-Fi 189A8 ,310004 Tel:86-571-86769027/8 Website: www.dusuniot.com 8810480 www.dusunremotes.com Floor 8, building A, Wantong center, Hangzhou 310004, china www.dusunlock.com 8.Installation 8.1 Lanyard Can be worn on the neck. 189A8 ,310004 Tel:86-571-86769027/8 Website: www.dusuniot.com 8810480 www.dusunremotes.com Floor 8, building A, Wantong center, Hangzhou 310004, china www.dusunlock.com 9.QARequirements Information Description StandardYescustomNo Quality & Testing Information Yes Yes Yes Yes Yes ESD Testing Battery life Testing RF Antenna Analysis Environmental Testing Reliability Testing 10.WARNING This device 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 device 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 device does cause harmful interference to radio or television reception, which can be determined by turning the device off 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 device and receiver.

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

--Consult the dealer or an experienced radio/TV technician for help Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment This device contains licence-exempt transmitter(s)/receiver(s) that comply with Part 15 of the FCC Rules and Innovation, Science and Economic Development Canadas licence-exempt RSS(s). Operation is subject to the following two conditions: (1) This device may not cause interference. (2) This device must accept any interference, including interference that may cause undesired operation of the device Cet appareil contient des metteurs / rcepteurs exempts de licence conformes aux RSS (RSS) d'Innovation, Sciences et Dveloppement conomique Canada. Le fonctionnement est soumis aux deux conditions suivantes : (1) Cet appareil ne doit pas causer d'interfrences. (2) Cet appareil doit accepter toutes les interfrences, y compris celles susceptibles de provoquer un fonctionnement indsirable de l'appareil 189A8 ,310004 Tel:86-571-86769027/8 Website: www.dusuniot.com 8810480 www.dusunremotes.com Floor 8, building A, Wantong center, Hangzhou 310004, china www.dusunlock.com

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Nov 01, 2023 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint Shenzhen Timeway Testing Laboratories/ Zone C, 1st Floor, Block B, Jun Xiang Da Building, Zhongshan Park Road West, Tong Le Village, Nanshan District, Shenzhen, China. (Name of Agent company name and address) to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in the Federal Communications Commissions regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, still resides with T I M E D R O P S L L C / 237 Los Cerros Ave, Walnut Creek, CA 94598 (USA)

<Signature>

NameJohannes N Stahl TitleFounder Applicant Company: TIME DROPS LLC

Nov 01, 2023 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2AZ5T-PB002 Product Name: PB-2 Button Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential:

Schematics Block diagram Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors.

<Signature>

NameJohannes N Stahl TitleFounder Applicant Company: TIME DROPS LLC

TIME DROPS LLC Covered Equipment Certification Attestation Letter 10/20/2023 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2AZ5T-PB002 TIME DROPS LLC (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. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not covered equipment. TIME DROPS LLC (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. Signed: i. Yb A Printed name: Johannes Stahl Title: Founder Company Name: TIME DROPS LLC Date: 10/20/2023

TIME DROPS LLC U.S. Agent Designation for Service of Process -

Certification Attestation Letter 10/20/2023 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2AZ5T-PB002 Per section 2.911(d)(7) of the FCC rules, TIME DROPS LLC (the applicant) certifies that the equipment for which authorization is sought is designated to the following U.S. agent*

for service of process:

Company Name: TIME DROPS LLC FCC Registration Number (FRN): 0030983605 Physical U.S. Company Address: 237 Los Cerros Ave, Walnut Creek, CA 94598 Contact Person: Johannes Stahl Agent Email Address: jstahl@time-drops.com The above contact person accepts the obligation for service of process. The applicant 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. Applicant Signed: Agent Signed (if different from Applicant):

Signed: Ac Signed:

] y np Printed name: Johannes Stahl Printed name: Click here to enter text Title: Founder Title: Click here to enter text. Company Name: TIME DROPS LLC Company Name: Click here to enter text. Date: 10/20/2023 Date: Click here to enter a date. 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.