2BHNU-DFC5DDesktop Computer

Attestation Statements (July 19, 2024) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for (FCC ID: 2BHNU-DFC5D ) (Digital Instrument Co., Ltd), the undersigned, hereby authorize (NEWENERGYER LIMITED) to act as our designated U.S. agent for service of process, (Digital Instrument Co., Ltd) accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. (NEWENERGYER LIMITED) accepts the responsibility to act as designated U.S. agent for service of process, provides an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Applicant Information： Company name: Digital Instrument Co., Ltd Contact Name: Daniel Lien Address: 45 Soi Ngamwongwan 19, Bangkrasor, MueangNonthaburi, Nonthaburi 11000, Thailand Telephone No: 13538214502 Email: [email protected] FRN: 0035699123 Signature [Daniel Lien] U.S. Agent Information: Company Name: NEWENERGYER LIMITED Address: 1818 S Patton Ct, Denver, CO, 80219 Contact Name: CHUN LIU Telephone No: 213 289 5042 Email: [email protected] FRN: 0034665885 Signature [CHUN LIU]

(Digital Instrument Co., Ltd) (July 19, 2024) 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: 2BHNU-DFC5D) [Digital Instrument 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. Sincerely, (Applicant signature) (Applicant printed name) Daniel Lien (Digital Instrument Co., Ltd) (July 19, 2024) 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: 2BHNU-DFC5D) [Digital Instrument 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) Daniel Lien

Digital Instrument Co., Ltd (July 19, 2024) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Desktop Computer / DFC5D / FCC ID: 2BHNU-DFC5D ) 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: Daniel Lien Title: VP

Digital Instrument Co., Ltd (July 19, 2024) 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: Daniel Lien Title: VP

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 4 Model: DFC5D External Photos Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 4 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 4 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 4 of 4 WIFI ANT WIFI/BT ANT

FCC ID LABEL: Label Location:

FCC §15.247 (i), §2.1091 – RF Exposure FCC ID: 2BHNU-DFC5D 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 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 EDR GFSK&M CH 8±1 9 7.9433 2.2961 (3.61dBi) 0.004 1 Pass BLE GFSK& MCH 4±1 5 3.1623 2.2961 (3.61dBi) 0.001 1 Pass 2.4G WIFI ANT1 802.11b&2 462 15±1 16 39.8107 2.2803 (3.58dBi) 0.0181 1 Pass 2.4G WIFI ANT2 802.11ax( HT40)&24 52 14±1 15 31.6228 2.2803 (3.58dBi) 0.0144 1 Pass 5.2GWIFI ANT1 802.11ax8 0&5210 14±1 15 31.6228 2.6363 (4.21dBi) 0.0166 1 Pass 5.2GWIFI ANT2 802.11ax4 0&5190 14±1 15 31.6228 2.6363 (4.21dBi) 0.0166 1 Pass 5.8GWIFI ANT1 802.11ax2 0&5825 14±1 15 31.6228 2.5704 (4.1dBi) 0.0162 1 Pass 5.8GWIFI ANT2 802.11ax2 0&5825 14±1 15 31.6228 2.5704 (4.1dBi) 0.0162 1 Pass For the Max simultaneous transmission MPE: When a number of sources at different frequencies, and/or broadband sources, contribute to the total exposure, it becomes necessary to weigh each contribution relative to the MPE in accordance with the provisions of Table (A) and Table (B). To comply with the MPE, the fraction of the MPE in terms of E2, H2 (or power density) incurred within each frequency interval should be determined and the sum of all such fractions should not exceed unity. In order to ensure compliance with the MPE for a controlled environment, the sum of the ratios of the power density to the corresponding MPE should not exceed unity. That is BT+WIFI supported simultaneous transmission: BT+2.4GWIFI MIMO: ∑MPE Ratio =0.004+0.0325=0.0365≤1, BT+5GWIFI MIMO: ∑MPE Ratio =0.004+0.0332=0.0372≤1, So passed. Tech nolo gy Tune up Produce power(dBm) Maximum Tune-up (dBm) Antenna Gain(ANT 1/ANT 2) (numeric) Power Density (S) (mW/ cm2) MPE Limit (mW/ cm2) ∑ MPE Ratio ∑ MPE Ratio Limit Result ANT 1 ANT 2 ANT 1 ANT 2 ANT 1 ANT 2 2.4G WIFI MIM O 15 ±1 14 ±1 16 15 2.2803 (3.58dBi) 0.0181 0.0144 1 0.0325 1 Pass Tech nolo gy Tune up Produce power(dBm) Maximum Tune-up (dBm) Antenna Gain(ANT 1/ANT 2) (numeric) Power Density (S) (mW/ cm2) MPE Limit (mW/ cm2) ∑ MPE Ratio ∑ MPE Ratio Limit Result ANT 1 ANT 2 ANT 1 ANT 2 ANT 1 ANT 2 5G WIFI MIM O 14 ±1 14 ±1 15 15 2.6363 (4.21dBi) 0.0166 0.0166 1 0.0332 1 Pass

shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 TQX-WIFI6DD4-JHT 1. 终端天线规格书 AntennaSampleConfirmationFrom 供应商名称 VendorName 深圳市健海通天线技术有限公司 KenhaitongTechnologyCo.,Ltd. 客户名称 CustomerName 广州商科信息科技有限公司 产品名称 PRName WIFI6胶棒天线 型号 Model TQX-WIFI6DD4-JHT 客户料号 PartP/N 2106-WIFI6D41-0299 样品规格 Specification TQX-WIFI6DD4-JHT/胶棒天线-WIFI双频-SMA直公头母针(天线底部可90度弯 折)-WIFI6-黑色-增益4dBi/157MM/不带端子 检验项目 InspectionItem 性能测试 Performance 外观检查 TotalAppearance 结构 structure 其它 Others 检验结果 Inspection Result 黄志超陆艳红陈振宇- OK 备注 Remark 品质审核 QAAudit 陆艳红 工程审核 EngineerAudit 张烨 业务确认 Sales Confirm 黄金灵 以下由客户填写 ThefollowingarefilledbyCustomer 客户意见 Customer Evaluation 客户签字/盖章 Signation/ Chapter byCustomer 日期/date: shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 2.修改历史（Revisethehistory） 日期 （Date) 版本 (Version) 说明(Explain) 作者 (Author) 2024年6月V0.1 WIFI6胶棒天线(WIFI6RubberrodAntenna) 陈振宇 shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 3.目录(TOC) 1..............封面 (Cover)...........................................。 2. .............修改历史记录 （ModifyTheHistory)...................。 3..............目录 (Catalog).........................................。 4..............规格表 (SpecificationTable)...........................。 5. .............成品图 ( FinishedPicture) .................................。 6..............测试报告 (TestReport)................................。 7..............天线尺寸规格图（AntennaSizeSpecificationDiagram） ... 。 8. .............材质证明/报告 (Materialcertification/Report)......。 9..............包装示意说明 (Patterninstructions)... .......... ..。 shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 4. 规格参数表 技术参数(technicalparameter) 型号（Model） TQX-WIFI6DD4-JHT 频率范围-MHz(Frequencyrange-MHz) 2400-2483/5150-5850/5900-7130GHz (2.4GHz/5.8GHz/6E) 增益-dBi(Gain-dB)4±1 驻波比(SWR)≤2.3 输入阻抗-Ω(Inputimpedence-Ω)50 极化方式(Polarizationmode)垂直(Vertical) 最大功率-W(Maxpower-W)50 接头型号(Connectormodel) RPSMA-J（内螺纹内孔） 天线长度-mm(Antennalength-mm)157mm* ø 13mm 注：天线底部可90°弯折。 (Note:Thebottomoftheantennacanbebentat90°degrees.) 5.产品图片（ProductPicture） shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 6.1驻波及回损参数图(Theimpactlossparameterdiagram) 2400-2500/5150-5850/5900-7125MHz 频率 （MHz） 240025005150585064007125 驻波比 1.381.162.172.141.571.30 shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 6.2无源增益/效率参数图形(Passivegain/efficiencyparametergraphics) 2400-2500GHz Frequency/MHzEfficiency/%Gain/dB 240077.1 3.1 241076.6 3.01 242078.52 3.58 243076.44 3.24 244076.34 3.56 245076.82 3.33 246076.86 3.56 247077.32 3.61 248077.21 3.55 249078.54 3.85 250079.51 3.32 shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 6.3无源增益/效率参数图形(Passivegain/efficiencyparametergraphics) 5150-5850GHz Frequency/MHzEfficiency/%Gain/dB 515082.413.88 520080.723.70 525077.624.21 530082.64.08 535087.15.15 540082.64.91 545081.664.01 550085.314.21 555086.14.68 560082.794.32 565082.044.331 5700 80.204.21 575082.414.01 580080.724.1 585077.624.05 shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 6.4无源增益/效率参数图形(Passivegain/efficiencyparametergraphics) 5900-7150GHz Frequency/MHzEfficiency/%Gain/dB 595069.983.26 605063.243.51 615060.673.73 625071.83.05 635072.373.32 645073.243.33 655074.713.3 665073.533.44 675079.573.25 685078.343.24 695077.413.57 705077.813.54 715071.663.87 595069.983.26 605063.243.51 shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 7.天线尺寸规格图(Antennasizespecificationdiagram) shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 8.材质证明/报告(Materialcertification/Report) shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 shenzhenKenhaitongAntennaTechnologyCo.,Ltd. 广东健博通 证劵代码：831958 9.产品包装作业规范(Operatingspecificationforproductpackaging) 包装品名：TQX-WIFI6DD4-JHT包装料号：2106-WIFI6D41-0299包装版本：TEST：A 包材明细（Packagedetails） 包装产品图示（Graphic pictureofpackaging products） 编号（number） 品名 （nameofapart） 规格 （specifica tions） 用量 （Dosage） 1产品封口袋（PEbag）205*40mm1/2 2出货封口袋（PEbag）330*230mm1/50 3出货纸箱（carton）44*30*39cm1/1000-1200 作业步骤 （Jobstep） 注意事项（mattersneed attention） 1.准备所需包材放于有利作业之位置。 2.按照产品包装作业规范，用纸箱/PE袋，包装。2pcs封口袋入大袋 50PCS/包。 3.每箱放20-24包，共1000-1200PCS，装满箱后，填充物用透明胶带封 箱。 1.Preparetherequiredpackingmaterialsintheadvantageous operationposition. 2.Packageincarton/PEbagsaccordingtoproductpackaging operationspecifications.2pcssealingpocketintolargebag50 PCS/pack. 3.Put20-24packetsineachbox,totaling1000-1200PCS.After fillingthebox,thefillingmaterialissealedwithtransparent tape. 1.作业员须带手套操作。 2.注意装箱数量，不可多装， 少装。尾数必须注明。 3.纸箱不可堆放过高。以防重 压变形。 1.Theoperatormustwear glovesforoperation. 2.Payattentiontothe numberofpacking,notmore, less.Themantissamustbe indicated. 3.Cartonshouldnotbe stackedtoohigh.Toprevent heavypressuredeformation. 图示说明备注 审核制作日期 DSLSY2023.10.10 检验后2pcs装一个封口袋贴条码 （AfterInspection,2pcs) 25对入一个封口袋装50pcs贴标 签(25pairsintoasealedbag50 pcs)label 24包50pcs入出货箱1200pcs/箱贴出货外 箱标签(24pack50pcsinandoutbox1200 pcs/boxwithshippingboxlabel)

TEST REPORT Compiled by: Reviewed by: Approved by: Zhou Kui Arron Liu 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. Product Name: Desktop Computer FCC ID: 2BHNU-DFC5D Trademark: AVITA Model Number: DFC5D Prepared For: Digital Instrument Co., Ltd Address: 45 Soi Ngamwongwan 19, Bangkrasor, MueangNonthaburi,Nonthaburi 11000, Thailand Manufacturer: Shenzhen Hasee Innovation Co., Ltd Address: Hasee Building, Xintianxia Industrial Park, Bantian Street, Longgang District, Shenzhen，Guangdong, 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: Jun. 18, 2024 Sample tested Date: Jun. 18, 2024 to Jul. 11, 2024 Issue Date: Jul. 11, 2024 Report No.: CTB240711108RFX Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2013 Tes t Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB240711108RFX Report Tel: 4008-707- 283 Web: http://www.ctb-lab. net Page 2 of 56 TABLE OF CONTENT Test Report Declaration Page 1. VERSION .......................................................................... 4 2. TEST SUMMARY ................................................................... 5 3. MEASUREMENT UNCERTAINTY ..................................................... 6 4. PRODUCT INFORMATION AND TEST SETUP .......................................... 7 4.1 Product Information .................................................................... 7 4.2 Test Setup Configuration ............................................................... 7 4.3 Support Equipment .................................................................... 7 4.4 Channel List .......................................................................... 8 4.5 Test Mode ............................................................................ 8 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 .......................... 27 8.1 Block Diagram Of Test Setup .......................................................... 27 8.2 Limit ................................................................................ 27 8.3 Test procedure ....................................................................... 27 8.4 Test Result .......................................................................... 28 9. COUDUCTED PEAK OUTPUT POWER ............................................... 35 9.1 Block Diagram Of Test Setup .......................................................... 35 9.2 Limit ................................................................................ 35 9.3 Test procedure ....................................................................... 35 9.4 Test Result .......................................................................... 35 10. 20DB OCCUPIED BANDWIDTH...................................................... 39 10.1 Block Diagram Of Test Setup ......................................................... 39 10.2 Limit ............................................................................... 39 10.3 Test procedure ...................................................................... 39 10.4 Test Result ......................................................................... 39 11. CARRIERFREQUENCIES SEPARATION .............................................. 43 11.1 Block Diagram Of Test Setup ......................................................... 43 11.2 Limit ............................................................................... 43 11.3 Test procedure ...................................................................... 43 11.4 Test Result ......................................................................... 43 12. HOPPING CHANNEL NUMBER ...................................................... 47 12.1 Block Diagram Of Test Setup ......................................................... 47 12.2 Limit ............................................................................... 47 12.3 Test procedure .............…

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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: DFC5D 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