2BH5L-TN300digital microscope

FCC Caution： 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. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -Reorient or relocate the receiving antenna. -Increase the separation between the equipment and receiver. -Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -Consult the dealer or an experienced radio/TV technician for help. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

U.S. Agent Designation for Service of Process (Applicant and U.S. Agent are Separate Parties) TO: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTENTION: FCC Certification – Section 2.911(d)(7) Information Designated U.S. Agent Company Name: HOPEK CORPORATION INC Address:4358 S BANNOCK ST ENGLEWOOD, CO 80110 United States FRN:0034562900 Contact Name: Peter Davis Tel.: 561-235-6113 Email: [email protected] This letter is to confirm that we (HOPEK CORPORATION INC) have accepted the responsibility to act as the Designated U.S. Agent for Service of Process as required by section 47 CFR 2.911(d)(7) on behalf of the Applicant noted below. U.S. Agent Signature: Date: Signed by (Printed Name/Title): The Applicant acknowledges that they must maintain an agent for no less than one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information above changes. Applicant Company name: Shangrao Tieniu Technology Co., Ltd FRN: 0035762343 FCC ID: 2BH5L-TN300 Contact Name: Chuanxin Shu Street Address: 13-1B Shengqi Optics Industrial Park, Shangrao Economic and Technological Development Zone, Jiangxi Province, China Telephone No: 8607938201618 Email: [email protected] Applicant Signature: Date: August 13, 2024 Signed by (Printed Name/Title): Chuanxin Shu / Manager

Shangrao Tieniu Technology Co., Ltd 2024.08.20 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: 2BH5L-TN300 [Shangrao Tieniu 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. Sincerely, (Applicant signature) (Applicant printed name) Chuanxin Shu Shangrao Tieniu Technology Co., Ltd 2024.08.20 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: 2BH5L-TN300 [Shangrao Tieniu 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) Chuanxin Shu

Shangrao Tieniu Technology Co., Ltd 2024.08.20 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: digital microscope Trademark: TIENIU MODEL : TN300 FCC ID : 2BH5L-TN300 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 - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Please contact me if there is any information you may need. Sincerely, Client’s signature: Client’s name / title : Chuanxin Shu / Manager Contact information / address: 13-1B Shengqi Optics Industrial Park, Shangrao Economic and Technological Development Zone, Jiangxi Province, China

Shangrao Tieniu Technology Co., Ltd 2024.08.20 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen BCTC Testing 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, Client’s signature: Client’s name / title : Chuanxin Shu / Manager Contact information / address: 13-1B Shengqi Optics Industrial Park, Shangrao Economic and Technological Development Zone, Jiangxi Province, China

Report No.: BCTC2407505423E External Photos Report No.: BCTC2407505423E Report No.: BCTC2407505423E Report No.: BCTC2407505423E Report No.: BCTC2407505423E Report No.: BCTC2407505423E

Size:60*30mm digital microscope FCC ID: 2BH5L-TN300 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. Label location

Report No.: BCTC2407505423E Internal Photos Report No.: BCTC2407505423E Report No.: BCTC2407505423E Report No.: BCTC2407505423E Report No.: BCTC2407505423E Antenna Report No.: BCTC2407505423E Report No.: BCTC2407505423E Report No.: BCTC2407505423E Report No.: BCTC2407505423E Report No.: BCTC2407505423E Report No.: BCTC2407505423E

RF EXPOSURE EVALUATION METHOD FCC ID: 2BH5L-TN300 Applicable standard： In accordance with FCC 47 CFR part 2 (2.1093) this device has been defined as a portable device which is defined as a transmitting device designed to be used so that the radiating structure(s) of the device is/are within 20 centimeters of the body of the user. Portable devices must be evaluated using the specified in FCC 47 CFR part 2 (2.1093) and ANSI/IEEEC95.1-1992. and had been tested in accordance with the measurement methods and procedures specified in IEEE 1528-2003. Per FCC KDB 447498 D01 v06, the 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances s 50 mm are determined by: SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table. The 1-g 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 The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. Condition Mode Frequency (MHz) Conducted Power (dBm) Limit (dBm) Verdict NVNT b 2412 8.13 30 Pass NVNT b 2437 8.52 30 Pass NVNT b 2462 7.79 30 Pass NVNT g 2412 6.01 30 Pass NVNT g 2437 6.67 30 Pass NVNT g 2462 5.78 30 Pass NVNT n20 2412 4.78 30 Pass NVNT n20 2437 5.38 30 Pass NVNT n20 2462 4.97 30 Pass NVNT n40 2422 3.64 30 Pass NVNT n40 2437 4.12 30 Pass NVNT n40 2452 3.12 30 Pass max possible output power (PK,conducted)：8±1dBm 9dBm=7.94mW 2412MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 7.94/5*√2.412=2.466≤3.0 2437MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 7.94/5*√2.437=2.479≤3.0 2462MHz [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,mm)] · [√f(GHz)]= 7.94/5*√2.462=2.492≤3.0 Conclusion: 1. [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] * [√f(GHz)] < 3.0. 2. SAR Test Exclusion Thresholds is 3.0 for separation distance 5mm. Therefore, SAR test is not required.

Approval sheet Page 1 of 9 ASC_RFECA3216060A1T_V07 May. 2013 RFECA Series – RoHS Compliance CERAMIC ANTENNA Halogens Free Product 2.4 GHz ISM Band Working Frequency P/N: RFECA3216060A1T *Contents in this sheet are subject to change without prior notice. Approval sheet Page 2 of 9 ASC_RFECA3216060A1T_V07 May. 2013 FEATURES 1. Surface Mounted Devices with a small dimension of 3.2 X 1.6 X 0.6 mm 3 meet future miniaturization trend. 2. LTCC process. 3. High stability in Temperature / Humidity Change. 4. Superb performance to place on the middle of PCB edge and excellent peak/ average gain observed by field test application. APPLICATIONS 1. ISM Band 2.4GHz applications. 2. Bluetooth.. CONSTRUCTION DIMENSIONS Figure Symbol Dimension (mm) L 3.10 ± 0.20 W 1.60 ± 0.20 T 0.60 ± 0.10 A 0.25 ± 0.20 PIN Connection 1 Feeding 2 Soldering terminal Approval sheet Page 3 of 9 ASC_RFECA3216060A1T_V07 May. 2013 SOLDER LAND PATTERN DESIGN Figure (Empty Space 8.0 mm x 3.0 mm) The limited size for ECA3216 is L>30mm and D>6mm Land Pattern TYPE 1 ELECTRONIC CHARACTERISTICS *N ote 1. Central Frequency should be defined after customers’ application approval. Item Specification Working Frequency Range 2.4GHz~2.5GHz (Note-1) Gain 2.89 dBi (max.) VSWR 2.1 max. Polarization Linear Azimuth Beamwidth Omni-directional Impedance 50Ω Approval sheet Page 4 of 9 ASC_RFECA3216060A1T_V07 May. 2013 Antenna on Test Board ( Thickness 0.8mm) A ntenna S11 on Test Board Antenna VSWR on Test Board -10.62 dB @ 2.40 GHz -19.34 dB @ 2.45 GHz -9.648 dB @ 2.50 GHz 1.756 @ 2.40 GHz 1.391 @ 2.45 GHz 1.986 @ 2.50 GHz Approval sheet Page 5 of 9 ASC_RFECA3216060A1T_V07 May. 2013 Antenna Gain Approval sheet Page 6 of 9 ASC_RFECA3216060A1T_V07 May. 2013 RELIABILITY TEST Test item Test condition / Test method Specification Solderability JIS C 0050-4.6 JESD22-B102D *Solder bath temperature：235 ± 5°C *Immersion time：2 ± 0.5 sec Solder：Sn3Ag0.5Cu for lead-free At least 95% of a surface of each terminal electrode must be covered by fresh solder. Leaching (Resistance to dissolution of metallization) IEC 60068-2-58 *Solder bath temperature：260 ± 5°C *Leaching immersion time：30 ± 0.5 sec Solder : SN63A Loss of metallization on the edges of each electrode shall not exceed 25%. Resistance to soldering heat JIS C 0050-5.4 *Preheating temperature：120~150°C, 1 minute. *Solder temperature：270±5°C *Immersion time：10±1 sec Solder：Sn3Ag0.5Cu for lead-free Measurement to be made after keeping at room temperature for 24±2 hrs No mechanical damage. Electrical specification shall satisfy the descriptions in electrical characteristics under the operational temperature range within -40 ~ 85°C. Loss of metallization on the edges of each electrode shall not exceed 25%. Drop Test JIS C 0044 Customer’s specification. *Height：75 cm *Test Surface：Rigid surface of concrete or steel. *Times：6 surfaces for each units；2 times for each side. No mechanical damage. Electrical specification shall satisfy the descriptions in electrical characteristics under the operational temperature range within -40 ~ 85°C. Vibration JIS C 0040 *Frequency：10Hz~55Hz~10Hz(1min) *Total amplitude：1.5mm *Test times：6hrs.(Two hrs each in three mutually perpendicular directions) No mechanical damage. Electrical specification shall satisfy the descriptions in electrical characteristics under the operational temperature range within -40 ~ 85°C. Adhesive Strength of Termination JIS C 0051- 7.4.3 *Pressurizing force： 5N(≦0603)；10N(>0603) *Test time：10±1 sec No remarkable damage or removal of the termination. Approval sheet Page 7 of 9 ASC_RFECA3216060A1T_V07 May. 2013 Bending test JIS C 0051- 7.4.1 The middle part of substrate shall be pressurized by means of the pressurizing rod at a rate of about 1 mm/s per second until the deflection becomes 1mm/s and then pressure shall be maintained for 5±1 sec. Measurement to be made after keeping at room temperature for 24±2 hours No mechanical damage. Electrical specification shall satisfy the descriptions in electrical characteristics under the operational temperature range within -40 ~ 85°C. Temperature cycle JIS C 0025 1. 30±3 minutes at -40°C±3°C, 2. 10~15 minutes at room temperature, 3. 30±3 minutes at +85°C±3°C, 4. 10~15 minutes at room temperature, Total 100 continuous cycles Measurement to be made after keeping at room temperature for 24±2 hrs No mechanical damage. Electrical specification shall satisfy the descriptions in electrical characteristics under the operational temperature range within -40 ~ 85°C. High temperature JIS C 0021 *Temperature：85°C±2°C *Test duration：1000+24/-0 hours Measurement to be made after keeping at room temperature for 24±2 hrs No mechanical damage. Electrical specification shall satisfy the descriptions in electrical characteristics under the operational temperature range within -40 ~ 85°C. Humidity (steady conditions) JIS C 0022 *Humidity：90% to 95% R.H. *Temperature：40±2°C *Time：1000+24/-0 hrs. Measurement to be made after keeping at room temperature for 24±2 hrs ※ 500hrs measuring the first data then 1000hrs data No mechanical damage. Electrical specification shall satisfy the descriptions in electrical characteristics under the operational temperature range within -40 ~ 85°C. Low temperature JIS C 0020 *Temperature：-40°C±2°C *Test duration：1000+24/-0 hours Measurement to be made after keeping at room temperature for 24±2 hrs No mechanical damage. Electrical specification shall satisfy the descriptions in electrical characteristics under the operational temperature range within -40 ~ 85°C. Approval sheet Page 8 of 9 ASC_RFECA3216060A1T_V07 May. 2013 SOLDERING CONDITION Typical examples of soldering processes that provide reliable joints without any damage are given in Fig 2 Fig 2. Infrared soldering profile ORDERING CODE RF ECA 321606 0 A 1 T Walsin RF device Product code ANT : Antenna Dimension code Per 2 digits of Length, Width, Thickness : e.g. : 321606 = Length 32, Width 16, Thickness 06 Unit of dimension 0 : 0.1 mm 1 : 1.…

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No.：BCTC/RF-EMC-005 Page: 1 of 76 Edition：B.2 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2407505423E Applicant: Shangrao Tieniu Technology Co., Ltd Product Name: digital microscope Test Model: TN300 Tested Date: 2024-07-10 to 2024-08-09 Issued Date: 2024-08-09 Report No.: BCTC2407505423E No.：BCTC/RF-EMC-005 Page: 2 of 76 Edition：B.2 FCC ID: 2BH5L-TN300 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 BCTC Testing Co., Ltd, this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. Product Name: digital microscope Trademark: TIENIU Model/Type reference: TN300 Prepared For: Shangrao Tieniu Technology Co., Ltd Address: 13-1B Shengqi Optics Industrial Park, Shangrao Economic and Technological Development Zone, Jiangxi Province, China Manufacturer: Shangrao Tieniu Technology Co., Ltd Address: 13-1B Shengqi Optics Industrial Park, Shangrao Economic and Technological Development Zone, Jiangxi Province, China Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Zhancheng, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2024-07-10 Sample tested Date: 2024-07-10 to 2024-08-09 Issue Date: 2024-08-09 Report No.: BCTC2407505423E Test Standards: FCC Part15.247 ANSI C63.10-2013 Test Results: PASS Remark: This is WIFI-2.4GHz band radio test report. Tested by: Approved by: Lei Chen/Project Handler Zero Zhou/Reviewer Report No.: BCTC2407505423E No.：BCTC/RF-EMC-005 Page: 3 of 76 Edition：B.2 Table Of Content Test Report Declaration Page 1. Version .................................................................................................................. 5 2. Test Summary ....................................................................................................... 6 3. Measurement Uncertainty ..................................................................................... 7 4. Product Information And Test Setup ..................................................................... 8 4.1 Product Information ............................................................................................... 8 4.2 Test Setup Configuration ...................................................................................... 8 4.3 Support Equipment ............................................................................................... 9 4.4 Channel List .......................................................................................................... 9 4.5 Test Mode ........................................................................................................... 10 4.6 Table Of Parameters Of Text Software Setting ................................................... 10 5. Test Facility And Test Instrument Used ............................................................... 11 5.1 Test Facility ......................................................................................................... 11 5.2 Test Instrument Used .......................................................................................... 11 6. Conducted Emissions .......................................................................................... 13 6.1 Block Diagram Of Test Setup .............................................................................. 13 6.2 Limit .................................................................................................................... 13 6.3 Test Procedure ................................................................................................... 13 6.4 EUT Operating Conditions .................................................................................. 13 6.5 Test Result .......................................................................................................... 14 7. Radiated Emissions ............................................................................................. 16 7.1 Block Diagram Of Test Setup .............................................................................. 16 7.2 Limit .................................................................................................................... 17 7.3 Test Procedure ................................................................................................... 18 7.4 EUT Operating Conditions .................................................................................. 19 7.5 Test Result .......................................................................................................... 19 8. Radiated Band Emission Measurement And Restricted Bands Of Operation ..... 26 8.1 Block Diagram Of Test Setup .............................................................................. 26 8.2 Limit .................................................................................................................... 26 8.3 Test Procedure ................................................................................................... 27 8.4 EUT operating Conditions ................................................................................... 27 8.5 Test Result .......................................................................................................... 28 9. Power Spectral Density Test ............................................................................... 30 9.1 Block Diagram Of Test Setup .............................................................................. 30 9.2 Limit .................................................................................................................... 30 9.3 Test Procedure ................................................................................................... 30 9.4 EUT Operating Conditions ......................................…

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Report No.: BCTC2407505423E No.：BCTC/RF-EMC-005 Page: 77 of 79 Edition： B.2 16. EUT Test Setup Photographs Conducted Emissions Photo Radiated Measurement Photos Report No.: BCTC2407505423E No.：BCTC/RF-EMC-005 Page: 78 of 79 Edition： B.2