2BEHY-Z280LBUBaby Monitor

MCD Limited 2.911 (d)(5)(i) Equipment Type Attestation v1.2 Section 2.911(d)(5)(i) Certification – EquipmentType Company name: MCD Limited Address: 631, MY LOFT, 9 Hoi Wing Rd, Tuen Mun, Hong Kong Product Name: Baby Monitor FCC ID: 2BEHY-Z280LBU Model(s): Z280L BU,Zeus 2.911(d)(5)(i) EquipmentType We, [MCD Limited] (“the applicant”) certify that the equipment for which authorization is sought through certification is not: • Prohibited from receiving an equipment authorization pursuant to § 2.903; of the FCC rules. • Identified as an equipment type in the “Covered List” NOTE 1 Yours sincerely, Name: Tyler Yao Date: 11/25/2025 Title and Company name: Engineers / MCD Limited NOTE 1 “Covered List ”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

MCD Limited 2.911 (d)(5)(ii) Applicant Attestation v1.3 Section 2.911(d)(5)(ii) Certification – Applicant (Covered List ) Company name: MCD Limited Address: 631, MY LOFT, 9 Hoi Wing Rd, Tuen Mun, Hong Kong Product Name: Baby Monitor FCC ID: 2BEHY-Z280LBU Model(s): Z280L BU, Zeus 2.911(d)(5)(ii) Applicant filing We, [ MCD Limited] (“the applicant”) certify that, as of the date of the filing of the application, the applicant is not identified NOTE 1 on the “Covered List” NOTE 2 ,established pursuant to §1.50002 of this chapter,as an entity producing coveredcommunications equipment. Yours sincerely, Name: Tyler Yao Date: 11/25/2025 Title and Company name: Engineers / MCD Limited NOTE 1 Delete option not applicable to this application. NOTE 2 “Covered List ”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

MC Devices (USA) LTD U.S. Agent Letter of Attestation To: Federal Communications Commission Date: 11/25/2025 7435 Oakland Mills Road, Columbia, MD 21046, USA Ref: Attestation Statement -Part2.911 (d)(7) filing FCC ID: 2BEHY- Z 280LBU MCD Limited ("the applicant") certifies that, as of the date of the filing of the application, MC Devices (USA) LTD ("the agent") is our designated U.S. agent for service of process for the abovereference FCC ID. The applicant accepts to maintain an agent for service of process in the United States forno 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 judicialp 「 oceedinginvolving the equipment, whichever is later The applicant further acknowledges it is ourresponsib 仆 ityto inform the FCC whenever the agent information changes. MC Devices (USA) LTD ("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. DesiRnated U.S. ARent Company Name: MC Devices (USA) LTD FRN: 0033706433 Address: 2030 Main St., Suite 1300, Irvine, CA 92614 Contact Person: Yuan Yuan Tel: 6479732688 A p p l i c a n t Company Name: MCD Limited Address: 631, MY LOFT, 9 Hoi Wing Rd, Tuen Mun, Hong Kong, 999077,China Contact Person: Tyler Yao FRN: 0034729186 Tel: 852-34886618 Signature: Email: [email protected] Signature: Email: [email protected]

MCD Limited Agent Authorization Company: MCD Limited Address: 631, MY LOFT, 9 Hoi Wing Rd, Tuen Mun, Hong Kong Product Name: Baby Monitor Model Number(s): Z280L BU, Zeus Product Description: Baby Monitor We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: 11/25/2025 Name: Tyler Yao Title: Engineers Company: MCD Limited

MCD Limited Family models difference declaration Product Name: Baby Monitor Trade Name: TimeFlys Model Name: Z280L BU Family Model: Zeus Difference declaration: We (MCD Limited) hereby state that all the models are electrical identical including the same software parameter and hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.), same mechanical structure and design (including product enclosure, materials, etc.), the only difference is the model names. Regards, Signature Name: Jack Yuan Date: 11/10/2025

MCD Limited Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 11/25/2025 Subject; Request for Confidentiality FCC ID: 2BEHY-Z280LBU To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram BOM List Block Diagram Operational Description Tune-up procedure In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuantto KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Tyler Yao Title: Engineers

20mmX50mm 20mmX50mm

FCC ID: 2BEHY-Z280LBU Portable device According to §15.247(e)(i) and §1.1307(b)(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. According to KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(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 When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. Antenna Type: PCB Antenna Antenna Gain: 1.45dBi Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n 1g SAR Exclusion threshold SAR test exclusion 2.41 -6.65 0.216 -7±1 -6.0 0.251 <5 0.07799 3.00 YES 2.44 -6.89 0.205 -7±1 -6.0 0.251 <5 0.07847 3.00 YES 2.472 -7.84 0.164 -7±1 -6.0 0.251 <5 0.07899 3.00 YES GFSK Conclusion: For the max result : 0.07899≤ 3.0 for 1-g SAR, No SAR is required. Signature: Date: 2025-11-28 NAME AND TITLE (Please print or type): Alex /Manager COMPANY (Please print or type): Shenzhen NTEK Testing Technology Co., Ltd./ 1/F, Building E, Fenda Science Park, Sanwei Community, Xixiang Street Bao’an District, Shenzhen 518126 P.R. China

深圳市云顶通讯电子有限公司 Shenzhen Yunding Communication Electronics Co.,Ltd. SEANZHANG 2025-02-21 PCBA-天线测试报告 深圳云顶通讯电子有限公司 Shenzhen Yunding Communication Electronics Co.,Ltd. 一、测试环境 深圳云顶通讯电子有限公司 Shenzhen Yunding Communication Electronics Co.,Ltd. 二、设备图 深圳云顶通讯电子有限公司 Shenzhen Yunding Communication Electronics Co.,Ltd. 三、天线匹配更改 深圳云顶通讯电子有限公司 Shenzhen Yunding Communication Electronics Co.,Ltd. 四、天线VSWR 深圳云顶通讯电子有限公司 Shenzhen Yunding Communication Electronics Co.,Ltd. 五、天线-测试数据效率增益 FreqEffiGain (MHz)(%)(dBi) 240045.170.28 241046.120.35 242044.470.32 243046.460.44 244050.470.5 245055.471 246057.41.11 247059.491.04 248062.521.37 249065.471.45 250061.671.17

Report No.: N25081801003E Version.1.3 Page 1 of 52 RADIO TEST REPORT FCC ID: 2BEHY-Z280LBU Product: Baby Monitor Trade Mark: TimeFlys Model No.: Z280L BU Family Model: Zeus Report No.: N25081801003E Issue Date: Sept. 22, 2025 Prepared for MCD Limited 631, MY LOFT, 9 Hoi Wing Rd, Tuen Mun, Hong Kong Prepared by Shenzhen NTEK Testing Technology Co., Ltd. No. 24 Xinfa East Road, Xiangshan Community, Xinqiao Street, Baoan District, Shenzhen, Guangdong, People's Republic of China Tel: 0755-23200050 Website:http://www.ntek.org.cn Report No.: N25081801003E Version.1.3 Page 2 of 52 TABLE OF CONTENTS 1 TEST RESULT CERTIFICATION ............................................................................................................. 3 2 SUMMARY OF TEST RESULTS .............................................................................................................. 4 3 FACILITIES AND ACCREDITATIONS ..................................................................................................... 5 3.1 FACILITIES ....................................................................................................................................... 5 3.2 LABORATORY ACCREDITATIONS AND LISTINGS ........................................................................ 5 3.3 MEASUREMENT UNCERTAINTY .................................................................................................... 5 4 GENERAL DESCRIPTION OF EUT ........................................................................................................ 6 5 DESCRIPTION OF TEST MODES ........................................................................................................... 8 6 SETUP OF EQUIPMENT UNDER TEST ............................................................................................... 10 6.1 BLOCK DIAGRAM CONFIGURATION OF TEST SYSTEM ............................................................ 10 6.2 SUPPORT EQUIPMENT ................................................................................................................. 11 6.3 EQUIPMENTS LIST FOR ALL TEST ITEMS ................................................................................... 12 7 TEST REQUIREMENTS ......................................................................................................................... 14 7.1 CONDUCTED EMISSIONS TEST .................................................................................................. 14 7.2 RADIATED SPURIOUS EMISSION ................................................................................................ 17 7.3 6DB BANDWIDTH ........................................................................................................................... 26 7.4 DUTY CYCLE .................................................................................................................................. 27 7.5 PEAK OUTPUT POWER ................................................................................................................. 29 7.6 POWER SPECTRAL DENSITY ...................................................................................................... 30 7.7 CONDUCTED BAND EDGE MEASUREMENT .............................................................................. 32 7.8 SPURIOUS RF CONDUCTED EMISSIONS ................................................................................... 33 7.9 ANTENNA APPLICATION ............................................................................................................... 34 8 TEST RESULTS ..................................................................................................................................... 35 8.1 DUTY CYCLE ..................................................................................................................................... 35 8.2 MAXIMUM CONDUCTED OUTPUT POWER ............................................................................................ 38 8.3 -6DB BANDWIDTH .............................................................................................................................. 40 8.4 OCCUPIED CHANNEL BANDWIDTH ....................................................................................................... 42 8.5 MAXIMUM POWER SPECTRAL DENSITY LEVEL ..................................................................................... 44 8.6 BAND EDGE ...................................................................................................................................... 46 8.7 CONDUCTED RF SPURIOUS EMISSION ................................................................................................ 49 Report No.: N25081801003E Version.1.3 Page 3 of 52 1 TEST RESULT CERTIFICATION Applicant’s name ......................... : MCD Limited Address ....................................... : 631, MY LOFT, 9 Hoi Wing Rd, Tuen Mun, Hong Kong Manufacturer's Name .................. : MC Devices Co., Ltd. Address ....................................... : The 23th floor, Overseas Chinese mansion phase II , Gaoxinnanhuan road, Nanshan district, Shenzhen, China Product description Product name .............................. : Baby Monitor Model and/or type reference ...... : Z280L BU Family Model ............................... : Zeus Test Sample Number ................... : S2508180162-1# Date (s) of performance of tests .................. : Aug. 18, 2025 ~ Sept. 20, 2025 Measurement Procedure Used: APPLICABLE STANDARDS APPLICABLE STANDARD/ TEST PROCEDURE TEST RESULT FCC 47 CFR Part 2, Subpart J FCC 47 CFR Part 15, Subpart C ANSI C63.10-2020 KDB 558074 D01 15.247 Meas Guidance v05r02 Complied This device described above has been tested by Shenzhen NTEK Testing Technology Co., Ltd., and the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in…

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