2BTNO-SLM-PB-01smart board

Nanjing Su Ermei Technology Co.,Ltd Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 [December 23, 2025] U.S. Agent Designation [Nanjing Su Ermei Technology Co.,Ltd] 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: 2BTNO-SLM-PB-01 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 [Nanjing Su Ermei Technology Co.,Ltd]. [Nanjing Su Ermei Technology Co.,Ltd] with the FRN [0037746799] 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 [Wan Susu] [Huiying Fan] [manager] [Director] [Nanjing Su Ermei Technology Co.,Ltd] [GLOCERTS TECHNOLOGY INC]

Nanjing Su Ermei Technology Co.,Ltd (December 15, 2025) 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:2BTNO-SLM-PB-01 [Nanjing Su Ermei Technology Co.,Ltd] (“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)Wan Susu Nanjing Su Ermei Technology Co.,Ltd (December 15, 2025) 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:2BTNO-SLM-PB-01 [Nanjing Su Ermei Technology 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 as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name)Wan Susu

Nanjing Su Ermei Technology Co.,Ltd Model Difference Data:December 15, 2025 Product description: smart board Model name: SLM-PB-01, SLM-PB-02, SLM-PB-03, SLM-PB-04, SLM-PB-05 Trade Name: CDTECH, sulmeyhub FCC ID: 2BTNO-SLM-PB-01 All the model are the same circuit and RF module, only the model names are different. Regards Sincerely Client’s signature : Client’s name / title : Wan Susu(manager) Contact information / address:Room 3479, 3rd Floor, R&D Building, No. 588, Laiyinda Road, Jiangning, Nanjing City, Jiangsu Province

Nanjing Su Ermei Technology Co.,Ltd (December 15, 2025) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (smart board / SLM-PB-01, SLM-PB-02, SLM-PB-03, SLM-PB-04, SLM-PB-05 / FCC ID: 2BTNO-SLM-PB-01 ) 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: Wan Susu Title: manager

Nanjing Su Ermei Technology Co.,Ltd (December 15, 2025) 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 CTB 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: Wan Susu Title: manager

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 5 Model: SLM-PB-01 External Photos ANT1 ANT2 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 5 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 5 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 4 of 5 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 5 of 5

FCC ID LABEL: Label Location: FCC ID: 2BTNO-SLM-PB-01 Model No.: SLM-PB-01 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.

FCC §15.247 (i), §2.1091 – RF Exposure FCC ID: 2BTNO-SLM-PB-01 Applied procedures / limit According to FCC §15.247(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. 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 =0.00066/1+0.01324/1=0.0139≤1, BT+5GWIFI: ∑MPE Ratio =0.00066/1+0.02108/1=0.02174≤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 &2440 1±1 2 1.5849 1.6711 (2.23dBi) 0.00053 1 Pass BLE:2M GFSK &2440 1±1 2 1.5849 1.6711 (2.23dBi) 0.00053 1 Pass EDR 8DPSK &2441 2±1 3 1.9953 1.6711 (2.23dBi) 0.00066 1 Pass 2.4GWIFI ANT1 802.11g &2462 15±1 16 39.8107 1.6711 (2.23dBi) 0.01324 1 Pass 2.4GWIFI ANT2 802.11b &2462 15±1 16 39.8107 1.6711 (2.23dBi) 0.01324 1 Pass 5.2GWIFI ANT1 802.11n(H T40) &5230 15±1 16 39.8107 2.6607 (4.25dBi) 0.02108 1 Pass 5.2GWIFI ANT2 802.11n(H T40) &5230 14±1 15 31.6228 2.6607 (4.25dBi) 0.01675 1 Pass 5.8GWIFI ANT1 802.11n(H T40) &5755 13±1 14 25.1189 3.4356 (5.36dBi) 0.01718 1 Pass 5.8GWIFI ANT2 802.11a &5825 13±1 14 25.1189 3.4356 (5.36dBi) 0.01718 1 Pass

第 1 页共 10 页 承认书 SPECIFICATIONFORAPPROVAL 客户名称 CUSTOMERNAME: 客户料号 CUSTOMERP/N: 产品料号 PRODUCT P/N:Z2S59W2D66A 产品名称 PRODUCTNAME:WIFI2400/5800MHz天线 规格描述： Description: 版本 REV:A Z2S59W2D66A/2.4-5.8G/5dBi外置小胖子 天线+注塑大SMA镀镍公头公针 版 出厂签章 S I G N 核准 APPROVEDBY 审核 CHECKEDBY 制作 DRAMN 客户签章 S I G N 品质 QE 开发 R&D 工程 PE 第 2 页共 10 页 Contents ltemDescription 一、------------------------------------------------------------变更履历 二、-----------------------------------------------------------规格表 三、----------------------------------------------------------成品图 四、---------------------------------------------------------测试报告 五、-------------------------------------------------------产品实物图 第 3 页共 10 页 一、版本履历表（RevisionHistory）： 说明： 本规格书原则上有效期为1年； 若任一方需要修改时，需经双方协商一致，修改后方可执行； 在本规格书有效期满后，双方均未提出修改要求时，则本规格书有效期顺延1 年。 第 4 页共 10 页 二、规格表（SpecificationTable）： 产品主要技术参数 主要技术指标Maintechnicalspecifications 频率范围 （MHZ） 2400-2500/ 5150-5850 FrequencyRange (MHZ) 2400-2500/ 5150-5850 特性阻抗(Ω) 50Impedance(Ω)50 增益(dBi) 5±1Gain(dBi)5±1 输出电压 驻波比 ≤2.0VSWR≤2.0 极化方式 线极化 PolarizationLinear 方向性 全向性 RadiationOmni-directional 物理性能 PhysicalProperties 天线材料 白色杆套AntennacoverWhite 连接方式 SMA公头公针ConnectorTypeSMA 外露线长 无Exposedlengthempty 工作温度 -20 °C ~+70 °C OperatingTemp-20 °C ~+70 °C 第 5 页共 10 页 三、成品图（Productdrawing）： 保存温度 -20°C~+60°CStorageTemp-20°C~+60°C 第 6 页共 10 页 四、测试报告（Testreport）： 5.1 ：网络分析仪测试报告 第 7 页共 10 页 5.2 ：暗室 2D 、 3DRaditationPattern 2400MHz 2450MHz 2500MHz 第 8 页共 10 页 第 9 页共 10 页 第 10 页共 10 页 5.3 ：天线增益与效率 五、产品实物图（Productdrawing） ANT 频率（MHZ）增益（dBi）效率（%） 24004.6873.89 24504.2367.46 25004.1677.12 51504.2567.34 53505.2769.26 57505.3668.35 58504.7562.63

Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 41 TEST REPORT Compiled by: Reviewed by: Approved by: Kai Chen Martin Feng Bin Mei / Director Note: If there is any objection to the inspection results in this report, please submit a written report to the company within 15 days from the date of receiving the report. The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. “*” indicates the testing items were fulfilled by subcontracted lab. “#” indicates the items are not in CNAS accreditation scope. Test item description: smart board FCC ID: 2BTNO-SLM-PB-01 Trademark(s): CDTECH, sulmeyhub Model/Type reference: SLM-PB-01, SLM-PB-02, SLM-PB-03, SLM-PB-04, SLM-PB-05 Applicant’s name: Nanjing Su Ermei Technology Co.,Ltd Address: Room 3479, 3rd Floor, R&D Building, No. 588, Laiyinda Road, Jiangning, Nanjing City, Jiangsu Province Manufacturer: JIANGSUAUSTIN OPTRONICS TECHNOLOGY CO.,LTD Address: 1F, Building 2, Phase 1, Jingang Kechuang Park, No. 1 Kechuang Road, Qixia District, Nanjing, China Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: 1&2/F., Building A, No.26, Xinhe Road, Xinqiao, Xinqiao Street, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: Nov. 18, 2025 Sample tested Date: Nov. 18, 2025 to Dec. 09, 2025 Issue Date: Dec. 09, 2025 Report No.: CTB25111803801RF01 Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2020 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB25111803801RF01 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 41 TABLE OF CONTENT Test Report Declaration Page 1. VERSION ........................................................................................................................................ 3 2. TEST SUMMARY ........................................................................................................................... 4 3. MEASUREMENT UNCERTAINTY ................................................................................................. 5 4. PRODUCT INFORMATION AND TEST SETUP ............................................................................ 6 4.1 Product Information .......................................................................................................................... 6 4.2 Test Setup Configuration .................................................................................................................. 6 4.3 Support Equipment........................................................................................................................... 6 4.4 Channel List ..................................................................................................................................... 7 4.5 Test Mode ........................................................................................................................................ 7 4.6 Test Environment ............................................................................................................................. 7 5. TEST FACILITY AND TEST INSTRUMENT USED ....................................................................... 8 5.1 Test Facility ...................................................................................................................................... 8 5.2 Test Instrument Used ....................................................................................................................... 8 6. AC POWER LINE CONDUCTED EMISSION ................................................................................ 11 6.1 Block Diagram Of Test Setup ......................................................................................................... 11 6.2 Limit ................................................................................................................................................ 11 6.3 Test procedure ............................................................................................................................... 11 6.4 Test Result ..................................................................................................................................... 13 7. RADIATED SPURIOUS EMISSION ............................................................................................. 15 7.1 Block Diagram Of Test Setup ......................................................................................................... 15 7.2 Limit ................................................................................................................................................ 15 7.3 Test procedure ............................................................................................................................... 16 7.4 Test Result ..................................................................................................................................... 17 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS ............................................... 24 8.1 Block Diagram Of Test Setup ......................................................................................................... 24 8.2 Limit ................................................................................................................................................ 24 8.3 Test procedure ............................................................................................................................... 24 8.4 Test Result ..................................................................................................................................... 25 9. COUDUCTED OUTPUT POWER .....................…

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Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 108 TEST REPORT Compiled by: Reviewed by: Approved by: Kai Chen Martin Feng Bin Mei / Director Note: If there is any objection to the inspection results in this report, please submit a written report to the company within 15 days from the date of receiving the report. The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. “*” indicates the testing items were fulfilled by subcontracted lab. “#” indicates the items are not in CNAS accreditation scope. Test item description: smart board FCC ID: 2BTNO-SLM-PB-01 Trademark(s): CDTECH, sulmeyhub Model/Type reference: SLM-PB-01, SLM-PB-02, SLM-PB-03, SLM-PB-04, SLM-PB-05 Applicant’s name: Nanjing Su Ermei Technology Co.,Ltd Address: Room 3479, 3rd Floor, R&D Building, No. 588, Laiyinda Road, Jiangning, Nanjing City, Jiangsu Province Manufacturer: JIANGSUAUSTIN OPTRONICS TECHNOLOGY CO.,LTD Address: 1F, Building 2, Phase 1, Jingang Kechuang Park, No. 1 Kechuang Road, Qixia District, Nanjing, China Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: 1&2/F., Building A, No.26, Xinhe Road, Xinqiao, Xinqiao Street, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: Nov. 18, 2025 Sample tested Date: Nov. 18, 2025 to Dec. 09, 2025 Issue Date: Dec. 09, 2025 Report No.: CTB25111803801RF03 Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2020 Test Results PASS Remark: This is WIFI-2.4GHz band radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.:CTB25111803801RF03 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 108 TABLE OF CONTENT Test Report Declaration Page 1. VERSION ........................................................................................................................................ 3 2. TEST SUMMARY ........................................................................................................................... 4 3. MEASUREMENT UNCERTAINTY ................................................................................................. 5 4. PRODUCT INFORMATION AND TEST SETUP ............................................................................ 6 4.1 Product Information .......................................................................................................................... 6 4.2 Test Setup Configuration .................................................................................................................. 6 4.3 Support Equipment........................................................................................................................... 6 4.4 Channel List ..................................................................................................................................... 7 4.5 Test Mode ........................................................................................................................................ 7 4.6 Test Environment ............................................................................................................................. 8 5. TEST FACILITY AND TEST INSTRUMENT USED ....................................................................... 9 5.1 Test Facility ...................................................................................................................................... 9 5.2 Test Instrument Used ....................................................................................................................... 9 6. AC POWER LINE CONDUCTED EMISSION ................................................................................ 12 6.1 Block Diagram Of Test Setup ......................................................................................................... 12 6.2 Limit ................................................................................................................................................ 12 6.3 Test procedure ............................................................................................................................... 12 6.4 Test Result ..................................................................................................................................... 14 7. RADIATED SPURIOUS EMISSION ............................................................................................. 16 7.1 Block Diagram Of Test Setup ......................................................................................................... 16 7.2 Limit ................................................................................................................................................ 16 7.3 Test procedure ............................................................................................................................... 17 7.4 Test Result ..................................................................................................................................... 18 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS ............................................... 50 8.1 Block Diagram Of Test Setup ......................................................................................................... 50 8.2 Limit ................................................................................................................................................ 50 8.3 Test procedure ............................................................................................................................... 50 8.4 Test Result ..................................................................................................................................... 51 9. CONDUCTED OUTPUT POWER .............…

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Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 2 Model: SLM-PB-01 Radiated Emission Below 1G Above 1G Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 2 Conducted emissions