2BXNK-70521Automatic Chicken Door Duo Smart Control unit

Albert Kerbl GmbH Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 [August 14, 2026] U.S. Agent Designation [Albert Kerbl GmbH] acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought FCC ID: 2BXNK-70521 Name and company of U.S. agent: [GLOCERTS TECHNOLOGY INC] Physical U.S. address of agent: [19784 SUNKISSED RIDGE DR, RIVERSIDE, CA 92507] FRN of U.S. agent: [0036339737] Email address of U.S. agent: [[email protected]] Telephone of U.S.agent: (626) 588-8039 [GLOCERTS TECHNOLOGY INC] acknowledges their obligation to accept service of process on behalf of [Albert Kerbl GmbH]. [Albert Kerbl GmbH] with the FRN [0038770897] accepts its obligation to maintain an agent for service of process in the United States for no less than 1 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. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. Sincerely, Signature Signature [Bruno Mautendorfer] [Huiying Fan] [Product and Business Development Manager] [Director] [Albert Kerbl GmbH] [GLOCERTS TECHNOLOGY INC]

Albert Kerbl GmbH (August 12, 2026) 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 FCC ID: 2BXNK-70521 [Albert Kerbl Gmbh] (“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. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, (Applicant signature) (Applicant printed name)Bruno Mautendorfer Albert Kerbl GmbH (August 12, 2026) 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 FCC ID: 2BXNK-70521 [Albert Kerbl Gmbh] (“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)Bruno Mautendorfer

Albert Kerbl GmbH Model Difference Data:August 12, 2026 Product description: Automatic Chicken Door Duo Smart Control unit Model name: 70521, 70531, 70531-ROSE, 70533 Trade Name: KERBL FCC ID: 2BXNK-70521 All the model are the same circuit and RF module, only the name and appearance colors are different. Regards Sincerely Client’s signature : Client’s name / title : Bruno Mautendorfer(Product and Business Development Manager) Contact information / address:Felizenzell 9, 84428 Buchbach, Germany

Albert Kerbl GmbH (August 12, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Automatic Chicken Door Duo Smart Control unit / 70521, 70531, 70531-ROSE, 70533 / FCC ID: 2BXNK-70521) 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 Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location No No Attestation Statement No No External Photos No ☐ Block Diagram ☒ ☐ Schematics ☒ ☐ Test Report No No Test Setup Photos No ☐ User’s Manual ☐ NOTE 1 ☒ Internal Photos ☐ NOTE 1 ☒ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No required to be submitted with this application be permanently withheld from public review. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Signature: Name: Bruno Mautendorfer Title: Product and Business Development Manager

Albert Kerbl GmbH (September 16, 2026) 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 (Shenzhen NTT Testing Technology 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, Signature: Name: Bruno Mautendorfer Title: Product and Business Development Manager

FCC ID: 2BXNK-70521 External Photos ANT

FCC ID LABEL: Label Location: FCC ID: 2BXNK-70521 Model No.: 70521

FCC §15.247 (i), §2.1091 – RF Exposure FCC ID: 2BXNK-70521 Applied procedures / limit According to FCC §15.247(i) and §1.1310 e 1, systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. Limits for Occupational / Controlled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/ cm 2 ) Averaging Time |E| 2 ,|H| 2 or S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842 / f 4.89 / f (900 / f)* 6 30-300 61.4 0.163 1.0 6 300-1500 F/300 6 1500-100,000 5 6 Note: ƒ is frequency in MHz * = Power density limit is applicable at frequencies greater than 100 MHz Limits for General Population / Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/ cm 2 ) Averaging Time |E| 2 ,|H| 2 or S (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f)* 30 30-300 27.5 0.073 0.2 30 300-1500 F/1500 30 1500-100,000 1.0 30 Note: f = frequency in MHz * = Plane-wave equivalent power density MPE PREDICTION Predication of MPE limit at a given distance, Equation from OET Bulletin 65, Edition 97-01 Where: S = power density P = power input to antenna G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna,R=20cm Test Result of RF Exposure Evaluation BT+WIFI supported simultaneous transmission: BT+2.4GWIFI: ∑MPE Ratio =0.00141/1+0.02228/1=0.02369≤1, So passed. Modes& Channel Freq. (MHz) Tune up Produce power Maximu m peak output power (dBm) Output power to antenna (mW) Antenna Gain (numeric) Power Density (S) (mW/ cm2) Limit (mW / cm2 ) Result BLE 1M GFSK & HCH 1±1 2 1.5849 2.2336 (3.49dBi) 0.0007 1 Pass EDR 8DPSK & HCH 4±1 5 3.1623 2.2336 (3.49dBi) 0.00141 1 Pass 2.4G WIFI 802.11b & LCH 16±1 17 50.1187 2.2336 (3.49dBi) 0.02228 1 Pass

Antenna Test Report (Passive-BW) 欧讯 Date: 2026/3/2 小 S 外置天线 Comments: This antenna is good. Yeah! BAHB10020000 Test Point ID Freq. (MHz) TRP (dBm) Gain (dBi) Directivity (dBi) Efficiency (%) Efficiency (dB) Max (dBm) Theta of Max Phi of Max Min (dBm) Theta of Min Phi of Min AVG (dBm) Max/Min (dB) Max/AVG (dB) Min/AVG (dB) 12400.0 2400.002.663.0192.1%-0.362.6690 120 -16.000 0 -2.1018.654.76-13.90 22450.0 2450.003.494.2583.9%-0.763.4990 120 -22.830 30 -2.5226.336.02-20.31 32500.0 2500.003.104.3575.1%-1.243.1090 90 -19.820 30 -3.0322.926.14-16.79 4-------------------------------- 5-------------------------------- 6-------------------------------- 7-------------------------------- 8-------------------------------- 9-------------------------------- 10-------------------------------- 11-------------------------------- 12-------------------------------- 13-------------------------------- 14-------------------------------- 15-------------------------------- 16-------------------------------- 17-------------------------------- 18-------------------------------- 19-------------------------------- 20-------------------------------- 21-------------------------------- 22-------------------------------- 23-------------------------------- 24-------------------------------- 25-------------------------------- 26-------------------------------- 27-------------------------------- 28-------------------------------- 29-------------------------------- 30-------------------------------- 31-------------------------------- 32-------------------------------- 33 -------------------------------- 34-------------------------------- 35-------------------------------- 36-------------------------------- 37-------------------------------- 38-------------------------------- 39-------------------------------- 40-------------------------------- 41-------------------------------- 42-------------------------------- 43-------------------------------- 44-------------------------------- 45-------------------------------- 46-------------------------------- 47-------------------------------- 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Shenzhen NTT Testing Technology Co.,Ltd. Report No.: SZNTT26036991E1-2 SZNTT-TR838-0 Tel:0755-27889935 Web:http://www.ntt-testing.com Page 1 of 51 TEST REPORT Applicant : Albert Kerbl GmbH Address : Felizenzell 9, 84428 Buchbach, Germany Manufacturer : Albert Kerbl GmbH Address : Felizenzell 9, 84428 Buchbach, Germany Product Name : Automatic Chicken Door Duo Smart Control unit Model Number : 70521, 70531, 70531-ROSE, 70533 Trademark : KERBL FCC ID : 2BXNK-70521 Test Date : Feb. 25, 2026 to Mar. 06, 2026 Date of Report : Mar. 06, 2026 Test Result : This device described above has been tested by NTT, and the test results show that the equipment under test (EUT) is in compliance with the Standard requirements. And it is applicable only to the tested sample identified in the report. Test Procedure Used: Standards : FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10-2020 + Cor. 1-2023+C63.10a-2024 + Errata to C63.10a -2024 KDB 558074 D01 15.247 Meas Guidance v05r02 Prepared by(Test Engineer): Zhao Di Reviewer(Supervisor): Ken Wu Approved(Manager): Abel Yu Shenzhen NTT Testing Technology Co.,Ltd. Report No.: SZNTT26036991E1-2 SZNTT-TR838-0 Tel:0755-27889935 Web:http://www.ntt-testing.com Page 2 of 51 TABLE OF CONTENT 1. General Information .................................................................. 5 1.1. Description of Device (EUT) .......................................................................................... 5 1.2. Channel List ...................................................................................................................... 5 1.3. Summary of test result .................................................................................................... 6 1.4. Special Accessories and Auxiliary Equipment ............................................................ 6 1.5. Test mode .......................................................................................................................... 6 1.6. Test configuration ............................................................................................................. 7 1.7. Block Diagram .................................................................................................................. 7 1.8. Test Conditions ................................................................................................................. 7 1.9. Measurement Uncertainty (95% confidence levels, k=2) ......................................... 8 1.10. Test Facility ..................................................................................................................... 8 1.1 1. Test Equipment ............................................................................................................... 9 2. Conducted emission at the mains terminals test ................ 11 2.1. Limit .................................................................................................................................. 11 2.2. Test Setup ....................................................................................................................... 11 2.3. Test Procedure ............................................................................................................... 11 2.4. Test Result ...................................................................................................................... 12 3. Radiated Spurious Emissions ............................................... 14 3.1. Limit .................................................................................................................................. 14 3.2. Test Setup ....................................................................................................................... 15 3.3. Test Procedure ............................................................................................................... 17 3.4. Test Result ...................................................................................................................... 18 4. Maximum Peak Output Power ............................................... 23 4.1. Limit .................................................................................................................................. 23 4.2. Test Setup ....................................................................................................................... 23 4.3. Test Procedure ............................................................................................................... 23 4.4. Test Result ...................................................................................................................... 24 5. -20 dB Bandwidth Measurement ........................................... 28 5.1. Limit .................................................................................................................................. 28 5.2. Test Setup ....................................................................................................................... 28 5.3. Test Procedure ............................................................................................................... 28 5.4. Test Result ...................................................................................................................... 28 6. Carrier Frequency Separation Test ....................................... 32 6.1. Limit .................................................................................................................................. 32 6.2. Test Setup ....................................................................................................................... 32 6.3. Test Procedure ............................................................................................................... 32 6.4. Test Result ...................................................................................................................... 32 7. Number of Hopping Channel Test ...............…

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FCC ID: 2BXNK-70521 Test Photos