SQOCHIMEBLKWasserstein Wireless Chime

Wireless Chime USER MANUAL In the Box 1 x wired transmitter 1 x USB power adapter with 4 universal plugs 1 x wireless chime 1 x spade connector cable (3.3 ft) 1 x wire connector 1 x back cover pin 1 x tinned cable (0.3 ft) 2 x 3*20 mm screws Page 1 Overview The Wasserstein Wireless Chime gives you a custom wireless alert system for your Google Nest Doorbell (battery and Google Nest Doorbell (wired), and features seven pre-loaded tunes and four LED colors to choose from. Page 2 Safety Information Read carefully before installing: • Always wear suitable protective gear (e.g. safety goggles) when drilling holes, etc. • Before drilling holes in walls, check for electricity cables and water pipes. • Shut off the power to the doorbell transformer before you attempt to connect or remove it. Locate and shut off the circuit breaker switch of your home's main electricity supply. • Before touching any wires, use a voltage sensor to check that the power is actually off – the sensor will alert you if the wires are still live. Understanding the Wireless Chime 1. Halo LED / notification 2. LED dimmer 3. Tune selection 4. Ambient light sensor 5. Volume up 6. LED brighter 7. Volume down 15 4 6 7 2 3 Page 3 Understanding the Wired Transmitter Installation Installing the Doorbell Transmitter Choose a location that's nowhere near a heat or water source, and that won't be hit when opening the door. 1. Remove the silicone stopper from the top of the transmitter. 2. Use a pin to press the notch and remove the back cover. 1 2 3 1. Wired transmitter 2. Spade connector wire 3. AC power adapter connector Page 4 3. Screw the transmitter back cover onto the wall using 2 screws (3 x 20 mm) if necessary. ACOUTACINSWITCH InsideOutside Note: It is recommended that the transmitter be placed under a covered area or inside the house at the height between 4.5 ft to 6.0 ft. Page 5 4. Connect the spade connector to the back of the Nest Doorbell. 5. Connect the AC power terminals to the AC power adapter connector (there is no polarization). 6. Follow instructions on the Google Home APP to set up the chime type for your Nest Doorbell (battery) or Nest Doorbell (wired). ACOUTACINSWITCH Note: Transmitter is powered by 16-24 VAC AC adapter, the AC adapter needs to meet the safety standard requirements of IEC 62368-1, and the output power needs to meet the PS2 level. Please see page 9 for wire stripping instruction if the adapter comes with spade connectors. Page 6 Google Nest Doorbell Setup 1. Make sure the Google Nest Doorbell is connected to Wi-Fi. 2. Go to "Settings" by clicking the gear symbol on the top right. 3. Go to "Doorbell". 4. Make sure Ring indoor chime is "ON". 5. Press the doorbell and indoor chime will ring. Note: Google Nest Doorbell might take a minute to update the setting. 6. Confirm the transmitter and receiver is paired. Page 7 Installing the Wireless Chime Rotate clockwise until you hear the click to lock the plug in place. Plug the chime into an AC outlet. L o c K O p e n Setup and Operation Transmitter and Receiver Pairing 1. Press and hold both of the brightness adjustment buttons for 3 sec until the LED is blinking. Page 8 2. Press the doorbell button / smart doorbell. 3. Wireless Chime will be paired with the Wireless Transmitter. Changing the Tune Press the center button (Wasserstein logo) to change the doorbell tune. (7 tunes) Page 9 Adjusting the Volume • Press the +/- button to adjust the volume level you want. (6 levels) • To mute the chime, press the - button until you cannot hear the ring. Changing the Halo LED Color Press and hold the both center & volume down buttons to change the halo LED color. pinkbluewhitecyan Color options: Page 10 0.6 22 20 18 16 14 12 10 AWG 0.8 1.0 1.3 1.6 2.0 2.6 MM How to strip a wire using a wire stripping tool 1. Get a wire stripping tool labelled for your type of wire. CAUTION: Always wear protective gear and use proper tools and techniques to avoid injury. 2. Find the notch that matches your wire’s gauge. Change the Halo LED Brightness Adjustment • LED will automatically turn on when the ambient light goes down. • Press the / button to adjust the brightness to your preferred level. (7 Levels) • To turn off halo LED, press the button until the halo LED is off. Additional Chime(s) • You can connect up to 5 wireless chimes with a single transmitter. Simply plug in the additional wireless chime to the wall outlet and follow the pairing instructions. • Each chime can be set with its own tune and LED color. Page 11 How to strip a wire using a utility knife 1. Hold the utility knife so it gently rests on the wire. 2. Roll the wire under the blade to score the insulation. Note: Use protective gear when using a utility knife. 0.6 22 20 18 16 14 12 10 AWG 0.8 1.0 1.3 1.6 2.0 2.6 MM 4. Squeeze the stripping tool’s handles gently. 5. Spin the tool around the wire to ensure you’ve cut the insulation. 6. Slide the stripper off the wire to pull off the insulation. 3. Place the tip of the wire in the appropriate notch. Page 12 3. Bend the wire at the scored line and break off the insulation. 2. Insert the tinned cable into one side. (There is no polarity) AC Adapter Connector 1. Open up the notches on the connector CAUTION: Always wear protective gear and use proper tools and techniques to avoid injury. 4. Insert the AC power adapter cable to the other end and repeat step 3. 3. Close the notches on the connector and make sure the cable is tightly clamped. Page 13 Battery warning CAUTION: Risk of fire or explosion if the battery is replaced by an incorrect type. WARNING: – replacement of a battery with an incorrect type may defeat a safeguard; – disposal of a battery into fire or a hot oven, or mechanically crushing or cutting of a battery, may result in an explosion; – leaving a battery in an extremely high temperature surrounding environment, such as sunshine, fire, or hot surface may result in an explosion or the leakage of flammable liquid or gas; – a battery subjected to extr…

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EVER SPARKLE TECHNOLOGIES LTD. Form: RFT-AMER-TCB-OP-19n Revision: 1 Page 1 of 1 Date: 1/25/2023 Attention: Application Examiner Re: Covered List, located at https://www.fcc.gov/supplychain/coveredlist and 47 CFR parts §2.903 and §2.911(d)(5)(ii) of the FCC rules Applicant: [EVER SPARKLE TECHNOLOGIES LTD.] FCC ID: [SQOCHIMEBLK] To whom it may concern, [EVER SPARKLE TECHNOLOGIES LTD.] (“Applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to 47 CFR part §2.903 of the FCC rules and does not originate directly or indirectly from any company named on the covered list located in the link above or any subsidiary or affiliate thereof. Applicant further 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 and is not a subsidiary or affiliate of any such entity pursuant to 47 CFR part §1.50002 and required by 47 CFR part §2.911(d)(5)(ii) of the FCC rules. I HEREBY CERTIFY THAT I am authorized to make the representations above on behalf of the Applicant and agree to immediately notify Intertek if there is any change in the status identified above. ______________________________ [Signature of authorized Proprietor, Partner or Authorized Officer] [Printed Name] KS Ho [Title] Sr. Manager [Company name] EVER SPARKLE TECHNOLOGIES LTD. [Date] 2023-03-23

EVER SPARKLE TECHNOLOGIES LTD. Form: RFT-AMER-TCB-OP-19o Revision: 1 Page 1 of 1 Date: 1/25/2023 Attention: Application Examiner Re: Certification designating a U.S. agent for service of process pursuant to section 2.911(d)(7) of the FCC rules To whom it may concern, This letter is to confirm both [FCC US Agent, LLC] (“Agent”) and [EVER SPARKLE TECHNOLOGIES LTD.] (“Applicant”) acknowledge consent to obligations of each party pursuant to 47 CFR part §2.911(d)(7) of the FCC rules in regard to the agent for service of process. I am authorized to make the representations above on behalf of the Applicant. I further acknowledge the requirement to maintain an agent extends for no less than one year after the termination of all marketing and importation or the conclusion of and commission-related proceeding involving the equipment and agree to immediately notify the FCC and Intertek if there is any change in the status identified above. Applicant Company Name : EVER SPARKLE TECHNOLOGIES LTD. Contact Name : KS Ho Address : Unit 403, Nan Fung Commercial Centre, 19 Lam Lok St., Kowloon Bay, Kowloon, Hong Kong. Telephone No : (00852) 2558 7370 Email : [email protected] FCC ID : SQOCHIMEBLK Applicant FRN : 0012204202 Signature: ____________________________________ Date: ____________2023-03-03_________________ I [Tim Payne] HEREBY CERTIFY THAT I am authorized to make the representations above on behalf of the Agent. I consent to the obligation to accept service of process on behalf of the applicant in regard to the FCC ID designated above. Agent Company Name : FCC US Agent, LLC Contact Name : Tim Payne Address : 3722 Illinois Avenue, Saint Charles, IL, 60174, USA Telephone No : 708-571-3148 Email : [email protected] Agent FRN : 0033402884 Signature: ____________________________ Date: __________2023-03-03____________ I [KS Ho] HEREBY CERTIFY THAT

EVER SPARKLE TECHNOLOGIES LTD. [2023.2.23] Federal Communications Commission 445 12 th Street SW Washington, DC 20554 Subject: Limited Agency Agreement EVER SPARKLE TECHNOLOGIES LTD. FCC ID: SQOCHIMEBLK To Whom It May Concern: We, EVER SPARKLE TECHNOLOGIES LTD., hereby authorized Intertek Testing Services to act as our Agent for the purpose of preparing application for FCC ID number SQOCHIMEBLK under all applicable parts of the FCC rules and regulations. The effective date of this limited agency agreement is 23 February 2023. The Limited Agency Agreement expires on 23 February 2024, unless sooner terminated or extended by written notice to Intertek Testing Services and the Federal Communications Commission. This is to advise that we are in full compliance with the Anti-Drug Abuse Act. The applicant is not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 U.S.C. 862, and no party to the application is subject to a denial of federal benefits pursuant to that section. If you have any questions or comments, please do not hesitate to contact me. Sincerely, [Signature] [Type Name] KS Ho [Type Title] Sr. Manager

EVER SPARKLE TECHNOLOGIES LTD. 1(2) Attention: Certification reviewer RE: Request for Confidentiality FCC ID: SQOCHIMEBLK To Whom It May Concern: Permanent Confidentiality [Complete this section if permanent confidentiality is requested] Request to withhold permanently from public review certain portions of the application for equipment certification for the referenced FCC identifiers. This request for confidentiality is made pursuant to 47 CFR 0.457(d) and 0.459 of the FCC Rules. In particular, the following sections of the application are to be kept permanently confidential: [Select one or more of items below, as appropriate] Schematics Block Diagrams Operational Description Tune-up Procedure Parts List Internal Photos (see note) Users Manual (see note) Note 1: Internal Photos may be held confidential 1) if the circuit board or internal components are not accessible to users. For example, it is acceptable if the circuit board is enclosed in epoxy. 2) Also, it is acceptable if the device is not accessible to the public, for example, a device mounted on the top of a large tower (or in a fenced enclosure) such that it is only serviceable by professional designated technicians under a Non-Disclosure Agreement (NDA). All sales for these devices must be under a NDA restricting the disclosure of the propriety information, including internal photos. Users Manual may be held confidential only when the manual contains proprietary technical information intended for professional technicians obligated under a NDA. All sales and distribution of the user’s manual must be under a NDA that restricts the disclosure of the information. In the application cover letter requesting permanent confidentiality the following additional description and the NDA exhibit is required: 1. Describe in detail how internal photos and/or users manual information are controlled to prevent them from becoming public or disclosed to unauthorized persons. 2. Describe how public access is restricted for products serviceable by professional designated technicians. 3. A statement that all sales of the non-consumer device will be under a NDA to include third party sales and that the final user of the device is subject to the NDA. 4. Provide an example of the NDA between the grantee and a purchaser. The request for confidentiality must Note 2: For scanning receiver, the schematics, block diagrams, operational description, tune-up procedure, parts list and internal photos are always held permanently confidential. Short-term Confidentiality [Complete this section if short-term confidentiality is requested] Request to withhold from public review for a period of [please enter 1 to 180] days from the date of the Grant of Equipment Authorization and prior to marketing, certain portions of the application for equipment certification for the referenced FCC identifiers. This request for confidentiality is made pursuant to 47 CFR 0.457(d) and 0.459 of the FCC Rules. In particular, the following sections of the application are to be kept short-term confidential for a period above from the date of the grant [Select one or more of items below that are not selected in the list above, as appropriate] Schematics Block diagrams Operational Description Tune-up Procedure EVER SPARKLE TECHNOLOGIES LTD. 2(2) Parts List Test Setup Photos External Photos Internal Photos Users Manual Rationale for request for confidentiality: We have invested considerable time and materials in research and development to produce the referenced product. Permanent confidentiality: Disclosure of the permanently confidential portions of this application to competitors would not only give them significant competitive advantages in developing similar products, but would also disclose successful implementation of unpublished, leading edge technology developed by us. Short-term confidentiality: Disclosure of the short-term confidential portions of this application during the period of importation and/or distribution would reveal key aspects of proprietary technology to competitors and diminish the value of our investment in research and development. If you have questions or need further information, please contact the undersigned. Sincerely, _________________ KS Ho [Title] Sr. Manager [Date] 2023-02-23

TEST REPORT TEST REPORT TEST REPORT

MADE IN CHINA Wasserstein Input: 16-24VAC or AAA battery x 2. Model: NestDB3WChimeWhtUSA FCC ID: SQOCHIMEBLK IC : 23312-CHIME Wasserstein MADE IN CHINA Input: 16-24VAC or AAA battery x 2. Model: BKDBChimeBLKUS FCC ID: SQOCHIMEBLK IC : 23312-CHIME BLACK Version WHITE Version MADE IN CHINA Wasserstein Input: 16-24VAC or AAA battery x 2. Model: NestDB3ChimeBLKUSA FCC ID: SQOCHIMEBLK IC : 23312-CHIME BLACK Version(for Google)

TEST REPORT TEST REPORT TEST REPORT 433MHz Antenna TEST REPORT

INTERTEK TESTING SERVICES RF Exposure The Equipment Under Test (EUT) is a Wasserstein Wireless Chime with 433.92MHz transmit function operating at 433.92MHz. The EUT is powered by DC 1.5V AAA battery*2 or 16-24VAC by adapter. For more detailed features description, please refer to the user’s manual. Antenna Type: Integral Antenna Modulation: FSK Antenna Gain: 0dBi Max. The normal radiated output power (e.i.r.p) is: -13dBm (tolerance: +/-1dB). Max e.r.p= e.i.r.p-2.15= -14.15dBm= 0.038mW The maximum peak radiated emission for the EUT is 82.4dBμV/m at 3m in the frequency 433.92MHz The EIRP = [(FS*D) ^2 / 30] mW = -12.8dBm The ERP= -12.8dBm-2.15dB= -14.95 dBm which is within the production variation. According to FCC Part 2.1091, this unlicensed transmitting devices is categorically excluded from routine environmental evaluation for RF exposure prior to equipment authorization or use, According to the KDB 447498 and OET 65, the simple calculation as below: The source-based time averaged maximum radiated power = -13dBm+1dB= -12dBm = 0.063mW At the distance (R) of 20cm to 40cm and in 0.3 GHz to 6 GHz, MPE Exclusion Threshold Level: The MPE limit is 885mW for general population and uncontrolled exposure in the 433.92MHz frequency range according to FCC Part 1.1307. As the maximum power at 20cm from the transmitter is lower than the MPE exempt limit, the compliance to the MPE limit can be ensured by indicating the minimum 20cm separation between the transmitter's radiating structure and body of the user or nearby persons. Note: EIRP is higher than ERP, thus EIRP is compared with the Exclusion Threshold. FCC ID: SQOCHIMEBLK

EVER SPARKLE TECHNOLOGIES LTD. TEST REPORT SCOPE OF WORK FCC TESTING–BKDBCHIMEBLKUS, NESTDB3WCHIMEWHTUSA, NESTDB3CHIMEBLKUSA REPORT NUMBER 221222005SZN-001 ISSUE DATE [REVISED DATE] 03 April 2023 [--------------------] PAGES 19 DOCUMENT CONTROL NUMBER FCC ID 231_a © 2017 INTERTEK Intertek Report No.: 221222005SZN-001 This report is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in accordance with the agreement, for any loss, expense or damage occasioned by the use of this report. Only the Client is authorized to permit copying or distribution of this report and then only in its entirety. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service must first be approved in writing by Intertek. The observations and test results in this report are relevant only to the sample tested. This report by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program. Intertek Testing Service Shenzhen Ltd. Longhua Branch 101, 201, Building B, No. 308 Wuhe Avenue, Zhangkengjing Community, GuanHu Subdistrict, LongHua District, ShenZhen. Tel: (86 755) 8601 6288 Fax: (86 755) 8601 6751 Version: 01-November-2017 Page: 1 of 19 FCC ID 231_a TEST REPORT 101, 201, Building B, No. 308 Wuhe Avenue, Zhangkengjing Community, GuanHu Subdistrict, LongHua District, ShenZhen. Tel: (86 755) 8601 6288 Fax: (86 755) 8601 6751 www.intertek.com EVER SPARKLE TECHNOLOGIES LTD. Application For Certification FCC ID: SQOCHIMEBLK Wasserstein Wireless Chime Model: BKDBChimeBLKUS, NestDB3WChimeWhtUSA, NestDB3ChimeBLKUSA Brand Name: Wasserstein Transmitter Report No.: 221222005SZN-001 We hereby certify that the sample of the above item is considered to comply with the requirements of FCC Part 15, Subpart C for Intentional Radiator, mention 47 CFR [10-1-21] Prepared and Checked by: Approved by: Draven Li Ryan Chen Project Engineer Project Engineer Date: 03 April 2023 Intertek Report No.: 221222005SZN-001 Version: 01-November-2017 Page: 2 of 19 FCC ID 231_a TEST REPORT MEASUREMENT/TECHNICAL REPORT This report concerns (check one) Original Grant X Class II Change Equipment Type: DSC - Part 15 Security Remote Control Transmitter Deferred grant requested per 47 CFR 0.457(d)(1)(ii)? Yes No X If yes, defer until : date Company Name agrees to notify the Commission by: date of the intended date of announcement of the product so that the grant can be issued on that date. Transition Rules Request per 15.37? Yes No X If no, assumed Part 15, Subpart C for intentional radiator - the new 47 CFR [10-01- 21] Edition] provision. Report prepared by: Draven Li Intertek Testing Services Shenzhen Ltd. Longhua Branch 101, 201, Building B, No. 308 Wuhe Avenue, Zhangkengjing Community, GuanHu Subdistrict, LongHua District, ShenZhen, P.R. China Tel: (86 755) 8614 0651 Fax: (86 755) 8601 6751 Intertek Report No.: 221222005SZN-001 Version: 01-November-2017 Page: 3 of 19 FCC ID 231_a TEST REPORT Table of Contents 1.0 Summary of Test results ........................................................................................................................ 4 2.0 General Description .............................................................................................................................. 5 2.1 Product Description ........................................................................................................................... 5 2.2 Related Submittal(s) Grants ................................................................................................................ 5 2.3 Test Methodology ............................................................................................................................. 5 2.4 Test Facility ....................................................................................................................................... 5 3.0 System Test Configuration ..................................................................................................................... 6 3.1 Justification ...................................................................................................................................... 6 3.2 EUT Exercising Software ..................................................................................................................... 6 3.3 Special Accessories ............................................................................................................................ 6 3.5 Equipment Modification ..................................................................................................................... 6 3.4 Measurement Uncertainty ................................................................................................................. 7 3.6 Support Equipment List and Description ............................................................................................. 7 4.0 Measurement Results ........................................................................................................................... 8 4.1 Field Strength Calculation ................................................................................................................... 8 4.2 Radiated Emission Configuration Photograph........................................................................................ 9 4.3 Radiated Spurious Emission ................................................................................................................ 9 4.4 Conducted Emission Configuration Photograph ................................................................................... 11 4.4.1 Conducted Emission ................................................................…

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Page 1 of 2 TEST REPORT RADIATED EMISSION TEST SET-UP Front View (Below 1GHz) Back View (Below 1GHz) The EUT is placed at the center of turntable Page 2 of 2 TEST REPORT Front View (Above 1GHz) Back View (Above 1GHz) The EUT is placed at the center of turntable

Page 1 of 1 TEST REPORT CONDUCTED EMISSION TEST SET-UP Front View Slide View