RF Exposure Evaluation Report
Report Reference No.: CTL2506182071-WFH
Date of Issue: Jul. 10, 2025
General Information
Environmental Conditions
Normal Temperature: 25°C -35°C
Relative Humidity: 35%-55 %
Air Pressure: 101 KPa
Product Description
Product Name: Automotive Diagnostic Tool
Model/Type Reference: MU8ASYS
Listed Models: TK191
Trade Mark: THINKCAR, MUCAR
FCC ID: 2AUARTKMU8A
Applicant: THINKCAR TECH CO., LTD.
Applicant Address: 2606, building 4, phase II, TiananYungu, Gangtou community, Bantian, Longgang District, Shenzhen, China
Manufacturer: THINKCAR TECH CO., LTD.
Manufacturer Address: 2606, building 4, phase II, TiananYungu, Gangtou community, Bantian, Longgang District, Shenzhen, China
Bluetooth Details
Version: Supported BR/EDR
Modulation: GFSK, π/4DQPSK, 8DPSK
Operation Frequency: 2402MHz to 2480MHz
Channel Number: 79
Channel Separation: 1MHz
Antenna Type: FPC Antenna
Antenna Gain: 4.81dBi
Bluetooth LE Details
Supported Type: Bluetooth Low Energy
Modulation: GFSK
Operation Frequency: 2402MHz to 2480MHz
Channel Number: 40
Channel Separation: 2MHz
Antenna Type: FPC Antenna
Antenna Gain: 4.81dBi
2.4G Wi-Fi Details
Supported Type: 802.11b/802.11g/802.11n(H20)/802.11n(H40)
Modulation: 802.11b: DSSS; 802.11g/802.11n(H20)/802.11n(H40): OFDM
Operation Frequency: 802.11b/802.11g/802.11n(H20): 2412MHz~2462MHz; 802.11n(H40): 2422MHz~2452MHz
Channel Number: 802.11b/802.11g/802.11n(H20): 11; 802.11n(H40): 7
Channel Separation: 802.11b/802.11g/802.11n(H20)/802.11n(H40)
Antenna Type: FPC Antenna
Antenna Gain: 4.81dBi
Note 1: For more details, refer to the user's manual of the EUT.
Note 2: Antenna gain and cable loss provided by the applicant.
Note 3: The product cannot be configured to operate outside the current frequency band plan through software configuration. Third parties are not allowed to change any software parameter configuration of the product.
Test Facility and Accreditation
Test Laboratory Address
Shenzhen CTL Testing Technology Co., Ltd.
Floor 1-A, Baisha Technology Park, No.3011, Shahexi Road, Nanshan District, Shenzhen, China 518055
The facility includes a 3m semi-anechoic chamber and two line conducted labs, meeting ANSI C63.4 and CISPR 32/EN 55032 requirements.
Laboratory Accreditation
The test facility is recognized, certified, or accredited by:
- CNAS-Lab Code: L7497 (Compliant with ISO/IEC 17025:2017)
- A2LA-Lab Cert. No. 4343.01 (Compliant with ISO/IEC 17025:2017)
- IC Registration No.: 9618B (CAB identifier: CN0041)
- FCC-Registration No.: 399832 (Designation No.: CN1216)
Statement of Measurement Uncertainty
Measurement uncertainty for transmitter power conducted is ±1.18 dB (95% confidence level, coverage factor k=1.96).
Method of Measurement
Applicable Standards
- ANSI C95.1–1999: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz.
- FCC KDB447498 D01 General RF Exposure Guidance v06: Mobile and Portable Device, RF Exposure, Equipment Authorization Procedures.
- FCC CFR 47 §1.1310: Radiofrequency radiation exposure limits.
- FCC CFR 47 §2.1093: Radiofrequency radiation exposure evaluation: portable devices
Evaluation Method and Limit
The evaluation follows KDB447498 D01 Section 4.3.1 for Standalone SAR test exclusion. The formula used is: [(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. Test exclusions apply when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz.
Conducted Power Results
| Mode | Frequency (MHz) | Maximum Peak Output Power(dBm) | EIRP (dBm) |
|---|---|---|---|
| BT | 2402 | -3.74 | 1.07 |
| BT | 2441 | -2.46 | 2.35 |
| BT | 2480 | -2.12 | 2.69 |
| BLE | 2402 | -3.51 | 1.30 |
| BLE | 2440 | -2.12 | 2.69 |
| BLE | 2480 | -1.68 | 3.13 |
| 2.4G WiFi | 2412 | -2.44 | 2.37 |
| 2.4G WiFi | 2437 | -1.90 | 2.91 |
| 2.4G WiFi | 2462 | -1.92 | 2.89 |
Manufacturing Tolerance
BT
| Channel | Channel 00 | Channel 39 | Channel 78 |
|---|---|---|---|
| Target (dBm) | 1.0 | 2.0 | 3.0 |
| Tolerance ±(dB) | 1.0 | 1.0 | 1.0 |
BLE
| Channel | Channel 00 | Channel 19 | Channel 39 |
|---|---|---|---|
| Target (dBm) | 1.0 | 3.0 | 3.0 |
| Tolerance ±(dB) | 1.0 | 1.0 | 1.0 |
2.4G WiFi
| Channel | Channel 01 | Channel 06 | Channel 11 |
|---|---|---|---|
| Target (dBm) | 2.0 | 3.0 | 3.0 |
| Tolerance ±(dB) | 1.0 | 1.0 | 1.0 |
Evaluation Results
Standalone Evaluation
| Mode | f (GHz) | Antenna Distance (mm) | RF output power (dBm) | RF output power (mW) | Result | SAR Test Exclusion |
|---|---|---|---|---|---|---|
| BT | 2.480 | 5 | 4.0 | 2.51 | 0.7906< 3.0 | Yes |
| BLE | 2.480 | 5 | 4.0 | 2.51 | 0.7906< 3.0 | Yes |
| 2.4G WiFi | 2.437 | 5 | 4.0 | 2.51 | 0.7837< 3.0 | Yes |
Remark:
- Output power including tune up tolerance;
- When the minimum test separation distance is < 5 mm, a distance of 5 mm according to f) in section 4.1 of KDB447498 D01 General RF Exposure Guidance v06 is applied to determine SAR test exclusion.
Conclusion
The measurement results comply with the FCC Limit per 47 CFR 2.1093 for the uncontrolled RF Exposure and SAR Exclusion Threshold per KDB447498 D01 General RF Exposure Guidance v06. No SAR is required.
