2BVAZ-C4MINI PC

Shenzhen Lanjin Technology Co., Ltd. 2026.9.08 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:2BVAZ-C4 [Shenzhen Lanjin 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) ：Jack bu Shenzhen Lanjin Technology Co., Ltd. 2026.9.08 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:2BVAZ-C4 [Shenzhen Lanjin 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) ：Jack bu

Shenzhen Lanjin Technology Co., Ltd. Family models declaration letter. Date: September 8, 2026 We Shenzhen Lanjin Technology Co., Ltd. Of 2503 Mingtengzhongxin Building, No. 48 Qinghu Road, Qinghua Community, Longhua Street, Longhua District, Shenzhen, China Product: MINI PC Model Name: C4 FCC ID: 2BVAZ-C4 Serial Model: A8,A9,A10,A11,A12,A13,A14,C8,C9,C10,C11,C12,C13, C14,N8,N9,N10,N11,N12,N13,N1 Difference description of series models: All models have the same electrical design (i.e. circuit design, PCB layout, RF module/circuit, antenna type and position, components on PCB, etc.), mechanical structure and design are the same, only the model name, frame and color are different Thanks Sincerely Signature Name: Jack bu Date: Sep.08, 2026 Title: manager

Shenzhen Lanjin Technology Co., Ltd. 2026.9.08 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (MINI PC / C4,A8,A9,A10,A11,A12,A13,A14,C8,C9,C10,C11,C12,C13,C14,N8,N9,N10,N11,N12, N13,N14 / FCC ID: 2BVAZ-C4) 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 (SCH，Block Diagram，Operational Description, Software Security Requirements for UNII devices) required to be submitted with this application be permanently withheld from public review. the above documents are company proprietary information that could never get into the possession of your competition. Please contact me if there is any information you may need. Sincerely, Applicant’s Name: Jack bu Title: Manager Signature:

Shenzhen Lanjin Technology Co., Ltd. 2026.9.08 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 ETR Standard Technology Co., Ltd. Smith Chen 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, Applicant’s Name: Jack bu Title: Manager Signature:

Shenzhen Lanjin Technology Co., Ltd. 2026.9.08 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Short Term Confidentiality Request For(MINI PC / C4,A8,A9,A10,A11,A12,A13,A14,C8,C9,C10,C11,C12,C13,C14,N8,N9,N10,N11,N12, N13,N14/FCC ID: 2BVAZ-C4) To Whom It May Concern: In accordance with sections 0.457 and 0.459 of CFR 47, < Shenzhen Lanjin Technology Co., Ltd.>. requests short-term Confidentiality of following sections of this application for a period of 180 days after grant is issued. Test setup photos External photos Internal photos User’s manual These documents contain detailed system and equipment descriptions and related information about the product, which < Shenzhen Lanjin Technology Co., Ltd.> considers to be proprietary, confidential, and a custom design and otherwise, would not release to the general public. Since this design is a basis from which future technological products will evolve, < Shenzhen Lanjin Technology Co., Ltd.> feels that this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give our competitors an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Applicant’s Name: Jack bu Title: Manager Signature:

FCC ID: 2BVAZ-C4 RF Exposure Evaluation Limits According to47 CFR Part 2.1091 and 447498 D01 General RF Exposure Guidance v06 The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in 1.1307(b) Limits for Maximum Permissible Exposure (MPE) Frequency range (MHz) Electric field strength (V/m) Magnetic field strength (A/m) Power density (mW/cm 2 ) Averaging time (minutes) (A) Limits for Occupational/Controlled Exposures 0.3–3.0 614 1.63 *(100) 6 3.0–30 1842/f 4.89/f *(900/f 2 ) 6 30–300 61.4 0.163 1.0 6 300–1500 f/300 6 1500–100,000 5 6 (B) Limits for General Population/Uncontrolled Exposure 0.3–1.34 614 1.63 *(100) 30 1.34–30 824/f 2.19/f *(180/f 2 ) 30 30–300 27.5 0.073 0.2 30 300–1500 f/1500 30 1500–100,000 1.0 30 f = frequency in MHz Friis transmission formula: Pd = (Pout*G)/(4*pi*r 2 ) Where Pd = power density in mW/cm 2 , Pout = output power to antenna in mW; G = gain of antenna in linear scale, Pi = 3.1416; R = distance between observation point and center of the radiator in cm Pd id the limit of MPE, 1 mW/cm 2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. FCC ID: 2BVAZ-C4 Test Result of RF Exposure Evaluation The source of the evaluation data results is based on the test report ET-26073755E01/02/03 BLE Antenna gain=0.35dBi 2.4G WIFI Antenna gain=2.93dBi 5G WIFI Antenna gain=5.02dBi FOR BLE Mode Output power (dBm) Tune-up power (dBm) Max Tune-up (dBm) Max Tune-up (mW) Numeric antenna gain Power Density at R=20cm (mW/cm2) Limit (mW/cm2) Result GFSK 1.36 ±1 2 1.58 1.08 0.0003 1.0 PASS FOR 2.4GWIFI Mode Output power (dBm) Tune-up power (dBm) Max Tune-up (dBm) Max Tune-up (mW) Numeric antenna gain Power Density at R=20cm (mW/cm2) Limit (mW/cm 2 ) Result 802.11b 14.66 15±1 15 31.62 1.96 0.0123 1.0 PASS 802.11g 14.26 14±1 15 31.62 1.96 0.0123 1.0 PASS 802.11n20 14.16 14±1 15 31.62 1.96 0.0123 1.0 PASS 802.11n40 13.91 14±1 15 31.62 1.96 0.0123 1.0 PASS FOR 5GWIFI Mode Output power (dBm) Tune-up power (dBm) Max Tune-up (dBm) Max Tune-up (mW) Numeric antenna gain Power Density at R=20cm (mW/cm2) Limit (mW/cm 2 ) Result 802.11a 14.33 14±1 15 31.62 3.18 0.0200 1.0 PASS 802.11n20 14.66 15±1 16 39.81 3.18 0.0252 1.0 PASS 802.11ac20 14.65 15±1 16 39.81 3.18 0.0252 1.0 PASS 802.11n40 13.70 14±1 15 31.62 3.18 0.0200 1.0 PASS 802.11ac40 13.90 14±1 15 31.62 3.18 0.0200 1.0 PASS 802.11ac80 12.65 13±1 14 25.12 3.18 0.0159 1.0 PASS FCC ID: 2BVAZ-C4 FOR 5.8GWIFI Mode Output power (dBm) Tune-up power (dBm) Max Tune-up (dBm) Max Tune-up (mW) Numeric antenna gain Power Density at R=20cm (mW/cm2) Limit (mW/cm 2 ) Result 802.11a 14.32 14±1 15 31.62 3.18 0.0200 1.0 PASS 802.11n20 14.45 14±1 15 31.62 3.18 0.0200 1.0 PASS 802.11ac20 14.37 14±1 15 31.62 3.18 0.0200 1.0 PASS 802.11n40 14.14 14±1 15 31.62 3.18 0.0200 1.0 PASS 802.11ac40 13.21 13±1 14 25.12 3.18 0.0159 1.0 PASS 802.11ac80 13.16 13±1 14 25.12 3.18 0.0159 1.0 PASS If BT and WIFI work simultaneously BLE+2.4G WIFI, the total power density is 0.0003/1+0.0123/1=0.0126<1. BLE+5GWIFI, the total power density is 0.0003/1+0.0252/1=0.0255<1. BLE+5.8GWIFI, the total power density is 0.0003/1+0.0200/1=0.0203<1. Maximum power density=0.0255<1. Then SAR evaluation is not require .

ShenzhenTianweiInformationWirelessTechnologyCo., Ltd. Address:4th Floor, BuildingA1, Rixin SciencePark, No.528HuarongRoad,DalangStreet,LonghuaNew District,Shenzhen Phone:86-755-29361726Fax: 86-755-85268343 ConfidentialityRequirements ShenzhenTianweixunWirelessTechnologyCo., Ltd. holds proprietarytechnicalinformation,which may not be disclosedto any companyor individualwithoutthe prior written consentof the Company. Customer name： CUST OMER NAM Product Performance and Specifications Certification Tian wei xun antenna the research and development department E BOSGAME ProductName: PR ODUCT NAME AntennaVers - ion: BOARD MODEL V0 TianweiMaterialNumber: E4 CustomerClien TWX-152-011 t Formulator Admit manufacturing party CustomerConfirmation Customers confirmation Qualitydepartment Quality department Researchand developm- ent department R&D Approval ME: RF: Date (Date): Date: May 28,2026 Product Model: E4 Confidential Information ProductName:WIFI+BTAntenna ShenzhenTianweiInformationWirelessTechnologyCo.,Ltd. PrepareLiao Xianliang Specification EditionA1 IssuingDepartmentMinistryof TechnologyDate of issue2024-03-2 6 SecurityRequirements ShenzhenTianweixunWirelessTechnologyCo., Ltd. holds proprietarytechnicalinformation,which may not be disclosedto any companyor individualwithoutthe prior writtenconsentof the Company. Page 1 Index of Matrix 1.1 ProjectImage .............................................................................................................................2 1.1.1AntennaMatchingDiagram............................................................................................................2 2.1 purpose .......................................................................................................................................3 3.1 main antenna..............................................................................................................................3 3.1.1ElectricalSpecifications and Materialsof the Main Antenna .........................................................3 3.1.2AntennaType..................................................................................................................................3 3.1.3Workingfrequencyband for antennadesign.................................................................................. 3 3.1.4Main antennameasurementdata in the ETS-SG2 4SYSTEM3D test system...................3 3.1.5Passivestandingwave and echo loss in antennas ........................................................................... 4 3.1.6Actualtest results of the Wi-Fi antenna .......................................................................................... 6 4.1ProductDesignDiagram...............................................................................................................8 5.1ProductAssemblyDiagram..........................................................................................................11 5.1.1AntennaComposition................................................................................................................... 11 5.1.2AntennaAssembly ........................................................................................................................ 11 5.1.3After the antennais assembled,it is shown in the diagramwithin the entire device. ...................12 5.1.4EnvironmentalTreatmentDiagram ..............................................................................................12 Product Model: E4 Confidential Information Product Name: WIFI+BT Antenna Shenzhen Tianwei Information Wireless Technology Co., Ltd. PrepareLiao Xianliang Specification Edition A1 Issuing DepartmentMinistry of TechnologyDate of issue2024-03-26 Security Requirements Shenzhen Tianweixun Wireless Technology Co., Ltd. holds proprietary technical information that may not be disclosed to any company or individual without the prior written consent of the Company. Page 2 1.1 Project Image 1.1.1A ntenna Matching Diagram Element electric capacityinductance E1(0402) E2(0402) E3(0402) E4(0402) Matching Instructions: The matching follows the original motherboard configuration without modification. Product Model: E4 Confidential Information ProductName:WIFI+BTAntenna ShenzhenTianweiInformationWirelessTechnologyCo.,Ltd. PrepareLiao Xianliang Specification EditionA1 IssuingDepartmentMinistryof TechnologyDate of issue2024-03-2 6 SecurityRequirements ShenzhenTianweixunWirelessTechnologyCo., Ltd. holds proprietarytechnicalinformationthat may not be disclosedto any companyor individualwithoutthe prior writtenconsentof the Company.Page 3 2.1 Purpose Standardizethe productspecificationsand testingmethodsfor mobilecommunicationterminalantennasmanufacturedby ShenzhenTianweixunWirelessTechnologyCo., Ltd., to preventerrors causedby variationsin testingconditi ons or methods. 3.1 Main Antenna 3.1.1ElectricalSpecificationsand Materialsof the Main Antenna This report primarilyprovidesthe test results of the structuralperformanceparametersof the prototypeantennaP2 (P3, P4). Physicaldiagramof the antennadesignedby TianweiInformation 3.1.2AntennaType Type:PIFA antenna 3.1.3WorkingFrequencyBand for AntennaDesign The antennaoperatingfrequencybands are 2400 MHz to 2500 MHz and 5100 MHz to 5800 MHz. 3.1.4Main AntennaMeasurementData in the ETS-SG24SYSTEM3D Test System Figure (2) ETS TestingSystem Figure(3) Three-dimensionalpositioningdevicefor mobilephonesin a dark room Product Model: E4 Confidential Information Product Name: WIFI+BT Antenna Shenzhen Tianwei Information Wireless Technology Co., Ltd. PrepareLiao Xianliang Specification Edition A1 Issuing DepartmentMinistry of TechnologyDate of issue2024-03-26 Security Requirements Shenzhen Tianweixun Wireless Technology Co., Ltd. holds proprietary technical information, which may not be disclosed to any company or individual without the prior written consent of the Company. Page 4 3.1.5Passive Standing Wave and Echo Loss in Antennas MAIN Passive Data: 2400MHZ: 24…

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Report No.: ET-26073755E01 Tel: +86 0755 85259392 Email: [email protected] No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China TEST REPORT Applicant: Shenzhen Lanjin Technology Co., Ltd. Address of Applicant: 2503 Mingtengzhongxin Building,No. 48 Qinghu Road,Longhua Street, Longhua District,Shenzhen,China Manufacturer: Yancheng Lanjin Technology Co., Ltd. Address of Manufacturer： No. 222 Guanggu Building, Guanhua Road North and Shanghai Road West,Jianhu County,Yancheng,China Product Name: MINI PC Model No.: C4,A8,A9,A10,A11,A12,A13,A14,C8,C9,C10,C11,C12,C13,C14,N8,N9,N10,N11,N 12,N13,N14 Trade Mark: origimagic FCC ID: 2BVAZ-C4 Applicable standards: CFR Title 47 Part 15.247 Date of Test: Jul.30, 2026-Aug.18, 2026 Date of report issued: Aug.19, 2026 Remark: The results shown in this test report refer only to the sample(s) tested , this test report cannot be reproduced, except in full without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver Prepared By Shenzhen ETR Standard Technology Co., Ltd. Address: No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Compiled by: Reviewed by: Approved by: Project Engineer Project Manager Authorized Signature - Page 2 of 74 - Report No.: ET-26073755E01 Report Revision History Report No. Description Issue Date ET-26073755E01 Original Aug.19, 2026 - Page 3 of 74 - Report No.: ET-26073755E01 Tel: +86 0755 85259392 Email: [email protected] Web: www.etrlab.cn No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Contents Page 1. TEST SUMMARY ......................................................................................................................................4 2. GENERAL INFORMATION .......................................................................................................................5 2.1 GENERAL DESCRIPTION OF EUT .................................................................................................................5 2.2 TEST MODE ................................................................................................................................................7 2.3 DESCRIPTION OF SUPPORT UNITS ...............................................................................................................7 2.4 TEST FACILITY ............................................................................................................................................7 2.5 ADDITIONAL INSTRUCTIONS .........................................................................................................................7 3. TEST INSTRUMENTS LIST ......................................................................................................................8 4. TEST RESULTS AND MEASUREMENT DATA .......................................................................................9 4.1 ANTENNA REQUIREMENT .............................................................................................................................9 4.2 CONDUCTED EMISSIONS ...........................................................................................................................10 4.3 DUTY CYCLE .............................................................................................................................................13 4.4 PEAK CONDUCTED OUTPUT POWER ..........................................................................................................15 4.5 6DB BANDWIDTH ......................................................................................................................................16 4.6 POWER SPECTRAL DENSITY ......................................................................................................................23 4.7 BAND EDGES ............................................................................................................................................30 Conducted Emission Method ...................................................................................................................30 Radiated Emission Method ......................................................................................................................39 4.8 SPURIOUS EMISSION .................................................................................................................................44 Conducted Emission Method ...................................................................................................................44 Radiated Emission Method ......................................................................................................................57 5. TEST SETUP PHOTO .............................................................................................................................74 6. EUT CONSTRUCTIONAL DETAILS .......................................................................................................74 - Page 4 of 74 - Report No.: ET-26073755E01 Tel: +86 0755 85259392 Email: [email protected] Web: www.etrlab.cn No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China 1. Test Summary Test Item Section Result Test by Antenna requirement 47CFR Part 15.203 /247(b)(4) Pass / AC Power Line Conducted Emission 47CFR part 15.207 Pass Jason Huang Conducted Peak Output Power 47CFR part 15.247 (b)(3) Pass Oliver Wang 6dB Bandwidth 47CFR part 15.247 (a)(2) Pass Oliver Wang Power Spectral Density 47CFR part 15.247 (e) Pass Oliver Wang Band Edge 47CFR part 15.247(d) 47CFR part 15.205/15.209 Pass Oliver Wang Spurious Emission 47CFR part 15.247(d) 47CFR part 15.205/15.209 Pass Leo Zhong Remarks: 1. Pass: The EUT complies with the essen…

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Report No.: ET-26073755E02 This test report is valid for the tested samples only. It cannot be reproduced except in full without prior written consent of Shenzhen ETR Standard Technology Co., Ltd. TEST REPORT Applicant: Shenzhen Lanjin Technology Co., Ltd. Address of Applicant: 2503 Mingtengzhongxin Building,No. 48 Qinghu Road,Longhua Street, Longhua District,Shenzhen,China Manufacturer: Yancheng Lanjin Technology Co., Ltd. Address of Manufacturer: No. 222 Guanggu Building, Guanhua Road North and Shanghai Road West,Jianhu County,Yancheng,China Product Name: MINI PC Model No.: C4,A8,A9,A10,A11,A12,A13,A14,C8,C9,C10,C11,C12,C13,C14,N8,N9,N10,N11, N12,N13,N14 Trade Mark: origimagic FCC ID: 2BVAZ-C4 Applicable standards: CFR Title 47 Part 15.247 Date of Test: Jul.30, 2026-Aug.18, 2026 Date of report issued: Aug.19, 2026 Remark: The results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver Prepared By Shenzhen ETR Standard Technology Co., Ltd. Address: No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Compiled by: Reviewed by: Approved by: Project Engineer Project Manager Authorized Signature - Page 2 of 33 - Report No.: ET-26073755E02 Tel:(86-0755) 85259392 Email:[email protected] Web: www.etrlab.cn No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Report Revision History Report No. Description Issue Date ET-26073755E02 Original Aug.19, 2026 - Page 3 of 33 - Report No.: ET-26073755E02 Tel:(86-0755) 85259392 Email:[email protected] Web: www.etrlab.cn No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Contents Page 1. TEST SUMMARY ......................................................................................................................................4 2. GENERAL INFORMATION .......................................................................................................................5 2.1 GENERAL DESCRIPTION OF EUT .................................................................................................................5 2.2 TEST MODE ................................................................................................................................................7 2.3 DESCRIPTION OF SUPPORT UNITS ...............................................................................................................7 2.4 TEST FACILITY ............................................................................................................................................7 2.5 ADDITIONAL INSTRUCTIONS .........................................................................................................................7 3. TEST INSTRUMENTS LIST ......................................................................................................................8 4. TEST RESULTS AND MEASUREMENT DATA .......................................................................................9 4.1 ANTENNA REQUIREMENT .............................................................................................................................9 4.2 CONDUCTED EMISSIONS ...........................................................................................................................10 4.3 DUTY CYCLE .............................................................................................................................................13 4.4 CONDUCTED OUTPUT POWER ...................................................................................................................15 4.5 6DB BANDWIDTH ......................................................................................................................................16 4.6 POWER SPECTRAL DENSITY ......................................................................................................................18 4.7 BAND EDGES ............................................................................................................................................20 Conducted Emission Method ...................................................................................................................20 Radiated Emission Method ......................................................................................................................22 4.8 SPURIOUS EMISSION .................................................................................................................................24 Conducted Emission Method ...................................................................................................................24 Radiated Emission Method ......................................................................................................................26 5. TEST SETUP PHOTO .............................................................................................................................33 6. EUT CONSTRUCTIONAL DETAILS .......................................................................................................33 - Page 4 of 33 - Report No.: ET-26073755E02 Tel:(86-0755) 85259392 Email:[email protected] Web: www.etrlab.cn No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China 1. Test Summary Test Item Section Result Test by Antenna requirement 47CFR part 15.203/15.247 (b)(4) Pass / AC Power Line Conducted Emission 47CFR part 15.207 Pass Jason Huang Conducted Peak Output Power 47CFR part 15.247 (b)(3) Pass Oliver Wang 6dB Bandwidth 47CFR part 15.247 (a)(2) Pass Oliver Wang Power Spectral Density 47CFR part 15.247 (e) Pass Oliver Wang Band Edge…

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