2BTUH-A10-DCDoorbell

3 ◊ AA batteries Indicator Light （Lights up during reception or call activation.） Call Button Speaker Melody Selection Volume Control Transmitter Receiver ◆ Names and Functions of Each Part ◆ Installation Method 1. The transmitter comes with a pre-installed trial battery (already inserted). 2. Prepare and insert three AA batteries into the receiver. 3. Mount the transmitter using screws (open holes in the rear cover guide) or double-sided tape. ① ② ③ or Operating Range: Approx. 900 ft (under optimal conditions) Number of Melodies: A10-DC Volume Levels: 5 (Mute / Low / Medium / High / Maximum) Transmitter Battery: 12V 23A (included) Receiver Power: 3 × AA batteries (sold separately) Battery Life (Transmitter): Approx. 3 years (typical use) produced by AZ4U Manufacturer: AZ4U Country of Origin: China ◆If the receiver does not respond when the transmitter button is pressed 1.Check that three new AA batteries of the same brand are correctly installed in the receiver. Ensure that the receiverʼ s batteries have sufficient remaining capacity. Refer to this manual and press the volume button to make sure the receiver isn í t muted. 2.Check the transmitter status.。 Press the call button to see if the blue indicator light turns on. The transmitter includes a trial battery. If the light does not turn on, replace the battery with a new 12V 23A type. ＞If the button lights up blue but the receiver still does not chime, proceed to step 3 below. 3.Place the transmitter and receiver within approximately 3 ft (1 m) and press the call button. If the receiver works at this short distance, the installation environment may be causing interference. Metal, concrete, reinforced glass, brick, marble These materials may obstruct the wireless signal. Adjust the installation position as needed. ◆ If the receiver does not respond or the melody cannot be fixed despite normal volume settings 1. Set the receiver to your preferred melody. (Start here if you wish to fix the melody.) 2. Long-press the receiverʼ s volume button (with four lines). 3. When the receiverʼ s LED lights up, release the button and press and hold the transmitterʼ s button for about 5 seconds. ※ Note: Due to wireless signal conditions you may need to repeat this step up to 10 times. ※ If you have multiple transmitters, repeat this procedure for each to set unique melodies per transmitter. (Pressing transmitter A will play melody A, and pressing transmitter B will play melody B.) ※ If you have multiple receivers, this allows you to assign different melodies to each one. (Press the transmitter: Receiver A plays melody A, Receiver B plays melody B.) Do not press the side button when inserting batteries into the receiver. This may cause malfunction. Insert a thin object into t he notch on the back cover and twist gently to open. Open the transmitte r from the bottom edge! Battery replacement, etc.︖ Some rechargeable or slightly oversized AA batteries may not fit properly. Try a different brand of AA battery. ▼ If all three points above are fine but the receiver still doesn  t sound, please try steps 2 and 3 below. The transmitterí s battery is for trial use. Except for initial failure, it is not covered by warranty. see the troubleshooting section below. Doorbell User Manual If the receiver doesn í t sound when pressing the transmitter, Most issues can be resolved by referring to this manual. P M r o o d d e u l: c A t C N 1 a 0 m -D e: C Doorbell Operating Frequency: 315 MHz Safety Notice ・Do not disassemble or modify this product. ・Use only the specified battery. ・Avoid water, heat, and strong electromagnetic environments. FCC 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. 2.This device must accept any interference received, including interference that may cause undesired operation. Warranty & Disclaimer ・This product is provided “as is” . ・Warranty coverage, if applicable, is provided by the seller. ・The manufacturer and seller are not responsible for damages caused by improper use. 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. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 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 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 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 different from that to which the receiver is connected. -Consult the dealer or an experienced radio/TV technician for help. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.

Reiwa shokai Co., Ltd. 3-34-11-B Najima, Higashi-ku, Fukuoka-shi, Fukuoka, JapanShenzhen, China Attestation Statements Not Covered Entity Applicant & Not Covered Equipment To: Federal Communications Commission Date: Dec. 25, 25 7435 Oakland Mills Road, Columbia, MD 21046, USA Ref: Information Required by Section 2.911(d)(5)(i) & (ii) FCC ID: 2BTUH-A10-DC Reiwa shokai 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, established pursuant to § 1.50002 of reference chapter, as an entity producing “covered” communication equipment. The equipment for which authorization is sought is not “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List that prohibited from receiving an equipment authorization pursuant to section § 2.903 of the FCC rules. Sincerely yours, Applicant Signature Printed Name: NAMIKI HITOSHI Title:Manager Address: 3-34-11-B Najima, Higashi-ku, Fukuoka-shi, Fukuoka, JapanShenzhen, China Tel.: +86-13265921640 Email: [email protected]

1 | P a g e Reiwa shokai Co., Ltd. 3-34-11-B Najima, Higashi-ku, Fukuoka-shi, Fukuoka, JapanShenzhen, China Attestation Statements To: Federal Communications Commission Date: Dec. 25, 25 7435 Oakland Mills Road, Columbia, MD 21046, USA Subject: Attestation of Compliance with FCC Covered List Software Requirements FCC ID: [2BTUH-A10-DC] Product Name: [Doorbell] This letter serves as an attestation that the equipment identified above ☐ is / ☒ is not (select one) "covered" software as defined under the Federal Communications Commission (FCC) Covered List requirements, as outlined in FCC 22-84 and KDB 986446. Specifically, the undersigned certifies that the equipment for which authorization is sought: 1. Does not contain cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors, assignees, parents, subsidiaries, affiliates, or any entity that has rebranded or relabeled software produced by the aforementioned entities. 2. Does not have the capability to store, run, or deliver any software identified on the FCC Covered List, including but not limited to cybersecurity and anti-virus software. To support this attestation, the appendix evaluation documentation has been prepared and is included in the certification filing. This attestation is based on a thorough evaluation of the device's design, functionality, and software environment. The undersigned affirms that the information provided is accurate and complete to the best of their knowledge. Sincerely yours, Applicant Signature Printed Name: NAMIKI HITOSHI Title:Manager Address: 3-34-11-B Najima, Higashi-ku, Fukuoka-shi, Fukuoka, JapanShenzhen, China Tel.: +86-13265921640 Email: [email protected] 2 | P a g e Evaluation regarding to the Covered List Software: Compliance Methodology Evaluation Process Results Device is Inherent compliance ☒ The Chipset(s) used is limited to run the Cybersecurity or anti-virus software. The MCU “ F119“, The RF chip “ F119“ don’t support the mentioned function. ☐ The Memory used is limited to run the Cybersecurity or anti-virus software. The memory size is XXX, so don’t support the mentioned function. ☐ There is storage capacity limitation for store or install the Cybersecurity or anti-virus software. The storage capacity is XXX, so don’t support the mentioned function. ☐ Operating system used is limited to run, install or deliver the Cybersecurity or anti-virus software. The Operating system “XXX“ don’t support the mentioned function. Device is not Inherent compliance ☐ Evaluation Based on Software Bill of Materials (SBoM) See attached “SBoM“ Note:The SBoM content is limited to the scope of covered list software (e.g. antivirus and cybersecurity software). ☐ Evaluation Based on Scan for Software on the device ☐ Evaluation Based on Filesystem scan ☐ Evaluation Based on Running software check

Reiwa shokai Co., Ltd. 3-34-11-B Najima, Higashi-ku, Fukuoka-shi, Fukuoka, JapanShenzhen, China U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: Dec. 25, 25 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BTUH-A10-DC Reiwa shokai Co., Ltd. (“the applicant”) certifies that, as of the date of the filing of the application, [Herland International Trading Inc] (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. [Herland International Trading Inc] ("the agent) understand it is the agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address. Designated U.S. Agent Company Name: Herland International Trading Inc FRN: 0036324101 Address: 1370 Valley Vista Dr Ste 200 Diamond Bar, CA 91765 Signature: Contact Person: Jianfeng Gao Tel: 001-909-772-1888 Email: jianfenggao@hyunturlee- commerce.com Applicant Company Name: Reiwa shokai Co., Ltd. FRN: 0037780087 Address: 3-34-11-B Najima, Higashi-ku, Fukuoka-shi, Fukuoka, JapanShenzhen, China Signature: Contact Person: NAMIKI HITOSHI Tel: +86-13265921640 Email: [email protected]

Reiwa shokai Co., Ltd. 3-34-11-B Najima, Higashi-ku, Fukuoka-shi, Fukuoka, JapanShenzhen, China Date: Dec. 25, 25 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request for: FCC ID: 2BTUH-A10-DC Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request permanent confidential treatment of the exhibits accompanying this certification application as outlined below : ⎯ Block Diagram ⎯ Schematics ⎯ Operational Description The above exhibits contain trade secrets and/or proprietary information that are not publicly available and materials that the Applicant has spent considerable efforts in developing. Public disclosure of these may be harmful to the Applicant and give an unfair advantage to competitors on the market. Sincerely, Applicant Signature Printed Name: NAMIKI HITOSHI Title:Manager Address: 3-34-11-B Najima, Higashi-ku, Fukuoka-shi, Fukuoka, JapanShenzhen, China Tel.: +86-13265921640 Email: [email protected]

Reiwa shokai Co., Ltd. 3-34-11-B Najima, Higashi-ku, Fukuoka-shi, Fukuoka, JapanShenzhen, China Date: Dec. 25, 25 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization for FCC ID:2BTUH-A10-DC I, the undersigned, hereby authorize (Shenzhen DL Testing Technology Co., Ltd.) to act on our behalf in all matters relating to this application for equipment certification. Any act carried out by (Shenzhen DL Testing Technology Co., Ltd.) shall have the same effect as our own and I acknowledge that all responsibility for complying with the terms and conditions of certification, as specified by DERYCOM CERTIFICATION SERVICES, INC., still resides with (Reiwa shokai Co., Ltd.). We 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. §862, and that no party to the application, as defined in 47 CFR §1.2002(b), is subject to a denial of federal benefits that includes FCC benefits pursuant to that section. Sincerely, Applicant Signature Printed Name: NAMIKI HITOSHI Title:Manager Address: 3-34-11-B Najima, Higashi-ku, Fukuoka-shi, Fukuoka, JapanShenzhen, China Tel.: +86-13265921640 Email: [email protected]

Shenzhen DL Testing Technology Co., Ltd. FCC ID: 2BTUH-A10-DC EUT PHOTO(External Photos) Shenzhen DL Testing Technology Co., Ltd. FCC ID: 2BTUH-A10-DC Shenzhen DL Testing Technology Co., Ltd. FCC ID: 2BTUH-A10-DC Shenzhen DL Testing Technology Co., Ltd. FCC ID: 2BTUH-A10-DC ※※※※※ END OF REPORT ※※※※※

Size: 20*10 mm Model: A10-DC FCC ID: 2BTUH-A10-DC Label location

Shenzhen DL Testing Technology Co., Ltd. FCC ID: 2BTUH-A10-DC EUT PHOTO(Internal Photos) Shenzhen DL Testing Technology Co., Ltd. FCC ID: 2BTUH-A10-DC ※※※※※ END OF REPORT ※※※※※ ANT

FCC ID: 2BTUH-A10-DC RF Exposure Evaluation According to KDB 447498 D01 V06 and part 2.1093，Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)] · [√f (GHz) ] ≤ 3.0 for 1-g SAR, and ≤ 7.5 for 10-g extremity SAR, where f (GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison EIRP=E Meas +20log(d Meas )-104.7 EIRP is the equivalent isotropically radiated power, in dBm E Meas is the field strength of the emission at the measurement distance, in dBμV/m d Meas is the measurement distance, in m Here, Test Mode Field strength (dBuV/m) EIRP (dBm) Max tune-up (mW) Frequency (MHz) Min. distance(mm) Calc. thresholds limit 315 MHz 65.74 -29.42 0.00114 315 5 0.000128 3.0 So a SAR test is not required

Summary CoiltypeAntennaSpecification I TEM A NT S PEC M odel N ame 3 15Mhz A NT Center Frequency H orizontal V ertical 315MHz365MHz415MHz315MHz365MHz415MHz -1.26-0.76-0.58-0.42-0.330.07 MAX.Gain0.07dBi P olarization H orizontal a nd V ertical AzimuthBeam Pattern Omni-directional I mpedance 5 0 O hm AntennaLength38.20mm M anufacture AntennaPhoto&Length(mm) Horizontal:315MHz365MHz415MHz Power(dBm) Max:0Min:-40Scale:5/div Frequency (MHz) Gain(dBi) M ax M in A vg 3 15 - 1.26174 - 30.0801 - 7.18716 365-0.765802-36.5604-7.48023 415-0.585582-22.0315-6.59127 Vertical:315MHz365MHz415MHz Power(dBm) Max:0Min:-30Scale:5/div Frequency (MHz) Gain(dBi) M ax M in A vg 315-0.4229-22.1424-12.4294 365-0.3355-24.5837-10.4702 4150.07660-29.5214-9.20432 ANTTestLabs：

Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251128004R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 1 of 25 FCC Part 15C Test Report FCC ID:2BTUH-A10-DC Applicant: Reiwa shokai Co., Ltd. Address: 3-34-11-B Najima, Higashi-ku, Fukuoka-shi, Fukuoka, Japan Manufacturer: Shenzhen Kajiasi Electronics Co., Ltd Address: Room 3017, Building B, Nanling Technology Park, No. 7 Jianmin Road, Nanling Village Community, Nanwan Subdistrict, Longgang District, Shenzhen City, Guangdong Province, China Product Name: Doorbell Trade Mark: AZ4U Model Number: A10-DC Date of Receipt: Nov. 28, 2025 Test Date: Nov. 28, 2025 - Dec. 12, 2025 Date of Report: Dec. 12, 2025 Prepared By: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, Shenzhen, China Applicable Standards: FCC PART 15 C 15.231 ANSI C63.10:2020 Test Result: Pass Report Number: DLE-251128004R Prepared (Test Engineer): Alisa Song Reviewer (Supervisor): Jack Bu Approved (Manager): Jade Yang This test report is based on a single evaluation of one sample of above mentioned products. It is not permitted to be duplicated in extracts without written approval of Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251128004R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 2 of 25 Table of Contents Page 1.SUMMARY OF TEST RESULTS 4 1 MEASUREMENT UNCERTAINTY 4 2. GENERAL INFORMATION 5 2.1 GENERAL DESCRIPTION OF EUT 5 2.2 DESCRIPTION OF TEST MODES 5 2.3 BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 6 2.4 DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) 6 2.5 TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 6 2.6 EQUIPMENTS LIST FOR ALL TEST ITEMS 7 3. EMC EMISSION TEST 8 3.1 CONDUCTED EMISSION MEASUREMENT 8 3.1.1 POWER LINE CONDUCTED EMISSION LIMITS 8 3.1.2 TEST PROCEDURE 8 3.1.3 DEVIATION FROM TEST STANDARD 8 3.1.4 TEST SETUP 9 3.1.5 EUT OPERATING CONDITIONS 9 3.1.6 TEST RESULTS 9 3.2RADIATED EMISSION MEASUREMENT 10 3.2.1 RADIATED EMISSION LIMITS 10 3.2.2 TEST PROCEDURE 12 3.2.3 TEST SETUP 12 3.2.4 EUT OPERATING CONDITIONS 13 3.2.5 TEST RESULTS 14 4. 20DB OCCUPIED BANDWIDTH 19 4.1 APPLIED PROCEDURES / LIMIT 19 4.2 TEST PROCEDURE 19 4.3 DEVIATION FROM STANDARD 19 4.4 TEST SETUP 19 4.5 EUT OPERATION CONDITIONS 19 4.6 TEST RESULTS 20 5. CALCULATION OF AVERAGE FACTOR 21 5.1 APPLIED PROCEDURES / LIMIT 21 5.1.1 TEST PROCEDURE 21 5.1.2 TEST SETUP 21 5.1.3 EUT OPERATION CONDITIONS 21 Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251128004R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 3 of 25 5.1.4 TEST RESULTS 22 6. DWELL TIME 23 6.1 APPLIED PROCEDURES / LIMIT 23 6.1.1 TEST PROCEDURE 23 6.1.2 DEVIATION FROM STANDARD 23 6.1.3 TEST SETUP 23 6.1.4 EUT OPERATION CONDITIONS 23 6.1.5 TEST RESULTS 24 7. ANTENNA REQUIREMENT 25 7.1 STANDARD REQUIREMENT 25 7.2 EUT ANTENNA 25 8. TEST SETUP PHOTO 25 9. EUT PHOTO 25 Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251128004R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 4 of 25 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: FCC Part15 (15.231) , Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission N/A 15.209,15.231b Fundamental &Radiated Spurious Emission Measurement PASS 15.231a Transmission cease time PASS 15.215 20dB Bandwidth PASS 15.203 Antenna Requirement PASS NOTE: (1)” N/A” denotes test is not applicable in this Test Report Test lab: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, Shenzhen, China FCC Test Firm Registration Number: 854456 Designation Number: CN1307 IC Registered No.: 27485 CAB ID.: CN0118 1 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2,providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 Conducted Emission Test ±2.56dB 2 RF power,conducted ±0.42dB 3 Spurious emissions,conducted ±2.76dB 4 All emissions,radiated(<1G) ±3.65dB 5 All emissions,radiated(>1G) ±4.89dB 6 Temperature ±0.5°C 7 Humidity ±2% 8 20dB Bandwidth ±0.2MHz Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251128004R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 5 of 25 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF EUT Product Name: Doorbell Trademark: AZ4U Model No.: A10-DC Test Model: A10-DC Model Difference N/A Operation Frequency: 315MHz Channel numbers: 1 Channels Modulation technology: ASK Antenna Type: Internal Antenna Antenna gain: -0.42 dBi Power supply: DC 12V from battery Note: 1.For a more detailed features description, please refer to the manufacturer’s specifications or the User's Manual. 2.The EUT’s all information provided by client. 2.2 DESCRIPTION OF TEST MODES Note: (1) New battery is used during the test. To investigate the maximum EMI emission characteristics generates from EUT, the test system was pre-scanning tested base on the consideration of following EUT operation mode or test configuration mode which possible have effect on EMI emission level. Each of these EUT operation mode(s) or test configuration mode(s) mentioned above was evaluated respectively. Pretest Mode Description Mode 1 TX Mode(315MHz) For Conducted & Radiated Emission Final Test Mode Description Mode 1 TX Mode(315MHz) Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251128004R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 6 of 25 2.3 BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED Radiated Spurious Emission Test 2.4 DESCRIP…

Text truncated - open the document above for the full version.

Shenzhen DL Testing Technology Co., Ltd. FCC ID: XXXXX-A10-DC EUT TEST PHOTO Radiated Measurement Photos ※※※※※ END OF REPORT ※※※※※