2BXOA-MARK2Mark II Smart Highlighter

Rev 1/26/2023 Mark,Inc Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 09-07-2026 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BXOA-MARK2 (“Mark,Inc”) 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. (“Mark,Inc”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, (Applicant signature) Zhenyi Tang (Applicant printed name) Rev 1/26/2023 Mark,Inc Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 09-07-2026 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BXOA-MARK2 (“Mark,Inc”) certifies that, as of the date of the filing of the application, Mark,Inc is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, (Applicant signature) Zhenyi Tang (Applicant printed name)

1/1 US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: Mark,Inc Address: 838 Walker Rd., Suite 21-2, Dover, Delaware, 19904, County of Kent FRN: 0038771754 Contact Name: Zhenyi Tang Telephone No: (628) 249-8182 E-mail: [email protected] This letter is to confirm that the US Agent for Service of Process accepts responsibility to act as a local representative on behalf of Mark,Inc. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. Applicant: Company Name: Mark,Inc Product Description: Mark II Smart Highlighter FRN: 0038771754 Grantee Code: 2BXOA FCC ID: 2BXOA-MARK2 Contact Name: Zhenyi Tang Address: 838 Walker Rd., Suite 21-2, Dover, Delaware, 19904, County of Kent Telephone No: (628) 249-8182 E-mail: [email protected] The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. This Agreement is valid until (Permanently valid). Date: 2026/9/07 Applicant’s Name: Mark,Inc US Agent for Service of Process’s Name: Mark,Inc Title: Manager Title: Manager Signature Signature

Mark,Inc Date：09-07-2026 Product/ Model Number: Mark II Smart Highlighter FCC ID：2BXOA-MARK2 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following:  Testing  Approval applications and procedures We declare that QAI Laboratories Ltd. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by QAI Laboratories Ltd. on our behalf shall have the same effect as acts of our own. By: Zhenyi Tang Contact Listed on FCC Wesbite Title: Manager Email: [email protected] Telephone: (628) 249-8182 On behalf of: Mark,Inc

Mark,Inc Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: September 8, 2026 Subject; Request for Confidentiality FCC ID: 2BXOA-MARK2 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 Block Diagram Parts List Operational Description Tune-up Procedure Software Security Requirements for UNII devices 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 pursuant to 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: Zhenyi Tang Title: Manager

FCC ID: 2BXOA-MARK2 RF Exposure Evaluation According to KDB 447498 D01 General RF Exposure Guidance v06 and part 2.1093， Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances ≤ 5 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(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 Here, We use 5mm as separation distance to calculated. Bluetooth DTS: Transmit Frequency (GHz) Mode Measured Power (dBm) Tune-up power (dBm) Max tune-up power(dBm) Result calculation 1g SAR 2.480 GFSK 0.56 0±1 1 0.3965 3 Remark：1. FPCB Antenna gain is 1.15 dBi, So a SAR test is not required

Antenna testing environment Standing wave pattern state Standing wave return loss status Antenna Passive Test Parameter — S11 Antenna Passive Test Parameters — Efficiency & Gain Frequency (MHz)Efficiency (dBi)Gain (dBi)Efficiency (%) 2400.0 -5.140.37 30.59 2410.0 -5.020.85 31.46 2420.0 -4.840.45 32.82 2430.0 -4.910.74 32.28 2440.0 -4.740.98 33.56 2450.0 -4.701.14 33.89 2460.0 -4.781.15 33.25 2470.0 -4.850.92 32.71 2480.0 -5.080.83 31.07 2490.0 -5.120.52 30.77 2500.0 -4.830.66 32.89 Antenna Passive Test Parameters — 2D/3D Radiation Patterns Active Antenna Test Parameters — OTA Test Data Frequency band Test channel TRPTIS BT 0-1.65-81.18 39-0.84-82.32 BT Data Chart Frequency band Test channel TRPTIS BT 0-2.15-80.27 39-1.25-81.16 Added an iron plate. ANT type: FPCB ANT ANT Model: MARK-1 Manufacturer: Shenzhen Yishengbang Technology Co., Ltd. ADD: Unit 101, Building C, Shenzhen Hard Technology Industrial Park, Bao'an District, Shenzhen

Shenzhen NTT Testing Technology Co.,Ltd. Report No.: SZNTT26033750E1-1 SZNTT-TR828-0 Tel:0755-27889935 Web:http://www.ntt-testing.com Page 1 of 36 TEST REPORT Applicant : Mark,Inc Address : 838 Walker Rd., Suite 21-2, Dover, Delaware, 19904 Manufacturer : Mark,Inc Address : 838 Walker Rd., Suite 21-2, Dover, Delaware, 19904 Product Name : Mark II Smart Highlighter Model Number : Mark 2 Trademark : Mark FCC ID : 2BXOA-MARK2 Test Date : Aug. 12, 2026 – Aug. 21, 2026 Date of Report : Aug. 24, 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): Cindy Qin Approved(Supervisor): Ken Wu Approved(Manager): Abel Yu Shenzhen NTT Testing Technology Co.,Ltd. Report No.: SZNTT26033750E1-1 SZNTT-TR828-0 Tel:0755-27889935 Web:http://www.ntt-testing.com Page 2 of 36 TABLE OF CONTENT 1. General Information ..................................................................................... 4 1.1. Description of Device (EUT) ..................................................................................................................... 4 1.2. Channel List ................................................................................................................................................ 4 1.3. Summary of test result .............................................................................................................................. 5 1.4. Special Accessories and Auxiliary Equipment ....................................................................................... 5 1.5. Test mode .................................................................................................................................................... 5 1.6. Test configuration ...................................................................................................................................... 5 1.7. Block Diagram ............................................................................................................................................ 6 1.8. Test Conditions ........................................................................................................................................... 6 1.9. Measurement Uncertainty (95% confidence levels, k=2) .................................................................... 6 1.10. Test Facility ............................................................................................................................................... 7 1.11. Test Equipment ......................................................................................................................................... 8 2. Conducted emission at the mains terminals test ................................... 10 2.1. Limit............................................................................................................................................................ 10 2.2. Test Setup ................................................................................................................................................. 10 2.3. Test Procedure ......................................................................................................................................... 10 2.4. Test Result .................................................................................................................................................11 3. Radiated Spurious Emissions .................................................................. 13 3.1. Limit............................................................................................................................................................ 13 3.2. Test Setup ................................................................................................................................................. 14 3.3. Test Procedure ......................................................................................................................................... 16 3.4. Test Result ................................................................................................................................................ 17 4. Conducted Spurious Emissions ............................................................... 29 4.1. Limit............................................................................................................................................................ 29 4.2. Test Setup ................................................................................................................................................. 29 4.3. Test Procedure ......................................................................................................................................... 29 4.4. Test Result ................................................................................................................................................ 30 5. Band Edge Measurement .......................................................................... 31 5.1. Limit............................................................................................................................................................ 31 5.2. Test setup .................................................................................................................................................. 31 5.3. Test Procedure ......................................................................................................................................... 31 5.4. Test Result ...........................................................................…

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Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page1of33 RF Test Data Duty Cycle ........................................................................................................................................................................... 2 Maximum Peak Conducted Output Power ......................................................................................................................... 6 -6dB Bandwidth ................................................................................................................................................................. 10 Occupied Channel Bandwidth .......................................................................................................................................... 14 Maximum Power Spectral Density Level.......................................................................................................................... 18 Band Edge ......................................................................................................................................................................... 22 Conducted RF Spurious Emission ................................................................................................................................... 27 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page2of33 Duty Cycle Condition Mode Frequency (MHz) Antenna Duty Cycle (%) Correction Factor (dB) 1/T (kHz) NVNT BLE 1M 2402 Ant1 100 0 0.01 NVNT BLE 1M 2440 Ant1 100 0 0.01 NVNT BLE 1M 2480 Ant1 100 0 0.01 NVNT BLE 2M 2402 Ant1 100 0 0.01 NVNT BLE 2M 2440 Ant1 100 0 0.01 NVNT BLE 2M 2480 Ant1 100 0 0.01 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page3of33 Duty Cycle NVNT BLE 1M 2402MHz Ant1 Duty Cycle NVNT BLE 1M 2440MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page4of33 Duty Cycle NVNT BLE 1M 2480MHz Ant1 Duty Cycle NVNT BLE 2M 2402MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page5of33 Duty Cycle NVNT BLE 2M 2440MHz Ant1 Duty Cycle NVNT BLE 2M 2480MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page6of33 Maximum Peak Conducted Output Power Condition Mode Frequency (MHz) Antenna Conducted Power (dBm) Conducted Power (W) Limit Conducted(dBm) Verdict NVNT BLE 1M 2402 Ant1 -0.53 0.00089 30 Pass NVNT BLE 1M 2440 Ant1 -0.06 0.00099 30 Pass NVNT BLE 1M 2480 Ant1 0.56 0.00114 30 Pass NVNT BLE 2M 2402 Ant1 -0.54 0.00088 30 Pass NVNT BLE 2M 2440 Ant1 -0.1 0.00098 30 Pass NVNT BLE 2M 2480 Ant1 0.53 0.00113 30 Pass Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page7of33 Peak Power NVNT BLE 1M 2402MHz Ant1 Peak Power NVNT BLE 1M 2440MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page8of33 Peak Power NVNT BLE 1M 2480MHz Ant1 Peak Power NVNT BLE 2M 2402MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page9of33 Peak Power NVNT BLE 2M 2440MHz Ant1 Peak Power NVNT BLE 2M 2480MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page10of33 -6dB Bandwidth Condition Mode Frequency (MHz) Antenna -6 dB Bandwidth (MHz) Limit -6 dB Bandwidth (MHz) Verdict NVNT BLE 1M 2402 Ant1 0.69 0.5 Pass NVNT BLE 1M 2440 Ant1 0.706 0.5 Pass NVNT BLE 1M 2480 Ant1 0.7035 0.5 Pass NVNT BLE 2M 2402 Ant1 1.367 0.5 Pass NVNT BLE 2M 2440 Ant1 1.36 0.5 Pass NVNT BLE 2M 2480 Ant1 1.369 0.5 Pass Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page11of33 -6dB Bandwidth NVNT BLE 1M 2402MHz Ant1 -6dB Bandwidth NVNT BLE 1M 2440MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page12of33 -6dB Bandwidth NVNT BLE 1M 2480MHz Ant1 -6dB Bandwidth NVNT BLE 2M 2402MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page13of33 -6dB Bandwidth NVNT BLE 2M 2440MHz Ant1 -6dB Bandwidth NVNT BLE 2M 2480MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page14of33 Occupied Channel Bandwidth Condition Mode Frequency (MHz) Antenna 99% OBW (MHz) NVNT BLE 1M 2402 Ant1 1.0393 NVNT BLE 1M 2440 Ant1 1.0412 NVNT BLE 1M 2480 Ant1 1.0419 NVNT BLE 2M 2402 Ant1 2.0544 NVNT BLE 2M 2440 Ant1 2.0546 NVNT BLE 2M 2480 Ant1 2.0521 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page15of33 OBW NVNT BLE 1M 2402MHz Ant1 OBW NVNT BLE 1M 2440MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page16of33 OBW NVNT BLE 1M 2480MHz Ant1 OBW NVNT BLE 2M 2402MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page17of33 OBW NVNT BLE 2M 2440MHz Ant1 OBW NVNT BLE 2M 2480MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page18of33 Maximum Power Spectral Density Level Condition Mode Frequency (MHz) Antenna Conducted PSD (dBm/3kHz) Limit (dBm/3kHz) Verdict NVNT BLE 1M 2402 Ant1 -16.17 8 Pass NVNT BLE 1M 2440 Ant1 -15.76 8 Pass NVNT BLE 1M 2480 Ant1 -15.05 8 Pass NVNT BLE 2M 2402 Ant1 -21.04 8 Pass NVNT BLE 2M 2440 Ant1 -20.52 8 Pass NVNT BLE 2M 2480 Ant1 -19.9 8 Pass Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page19of33 PSD NVNT BLE 1M 2402MHz Ant1 PSD NVNT BLE 1M 2440MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page20of33 PSD NVNT BLE 1M 2480MHz Ant1 PSD NVNT BLE 2M 2402MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page21of33 PSD NVNT BLE 2M 2440MHz Ant1 PSD NVNT BLE 2M 2480MHz Ant1 Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page22of33 Band Edge Condition Mode Frequency (MHz) Antenna Max Value (dBc) Limit (dBc) Verdict NVNT BLE 1M 2402 Ant1 -48.27 -20 Pass NVNT BLE 1M 2480 Ant1 -54.13 -20 Pass NVNT BLE 2M 2402 Ant1 -33.35 -20 Pass NVNT BLE 2M 2480 Ant1 -53.11 -20 Pass Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page23of33 Band Edge NVNT BLE 1M 2402MHz Ant1 Ref Band Edge NVNT BLE 1M 2402MHz Ant1 Emission Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page24of33 Band Edge NVNT BLE 1M 2480MHz Ant1 Ref Band Edge NVNT BLE 1M 2480MHz Ant1 Emission Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page25of33 Band Edge NVNT BLE 2M 2402MHz Ant1 Ref Band Edge NVNT BLE 2M 2402MHz Ant1 Emission Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page26of33 Band Edge NVNT BLE 2M 2480MHz Ant1 Ref Band Edge NVNT BLE 2M 2480MHz Ant1 Emission Report No.: SZNTT26033750E1-1 SZNTT-TR728-0 Page27of33 Conducted RF Spurious Emission Condition Mode Frequency (MHz) Antenna Max Value (dBc) …

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