RF EXPOSURE Test Report

Product and Applicant Information

Applicant: Shenzhen ZhiHaiHe Tech Co., Ltd.

Address: Unit B, 2nd Floor, Block 3, 10th Industrial Zone, Tian Liao Community, Gong Ming Area, Guang Ming New District, Shen Zhen, China.

Manufacturer: Shenzhen ZhiHaiHe Tech Co., Ltd.

Factory: Shenzhen ZhiHaiHe Tech Co., Ltd.

Product Description:

• Product name: VARMILO Mechanical Keyboard
• Trademark: VARMILO
• Model name: VPE87
• Serial Model: VPE88, VPE92
• Standards: N/A
• Test method: KDB 447498 D01 v06

Date of Test: 2023-05-26~2023-07-06

Test result: Pass

Test Personnel

Test Engineer: Maleah Deng

Reviewed By: Leon Chen

Approved By: Tom Xue

Testing Laboratory Information

Laboratory: Shenzhen Microtest Co., Ltd.

Website: http://www.mtitest.com

Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China.

Contact: Tel: (86-755)88850135, Fax: (86-755) 88850136, E-mail: mti@51mti.com

Instructions for Report Usage

1. The report shall not be partially reproduced without the written consent of the laboratory.
2. The test results of this report are only responsible for the samples submitted.
3. This report is invalid without the seal and signature of the laboratory.
4. This report is invalid if transferred, altered or tampered with in any form without authorization.
5. Any objection to this report shall be submitted to the laboratory within 15 days from the date of receipt of the report.

1. Standalone SAR Test Exclusion Considerations

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.

These test exclusion conditions are based on source-based time-averaged maximum conducted output power of the RF channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure conditions.

The minimum test separation distance defined in 4.1 f) is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander.

To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified, typically in the SAR measurement or SAR analysis report, by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, according to the required published RF exposure KDB procedures.

When no other RF exposure testing or reporting are required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for SAR test exclusion.

When required, the device specific conditions described in the other published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion provisions.

a) For 100 MHz to 6 GHz and test separation distances ≤ 50 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.
• The values 3.0 and 7.5 are referred to as numeric thresholds in step b) below.

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 according to 4.1 f) is applied to determine SAR test exclusion.

b) For 100 MHz to 6 GHz and test separation distances > 50 mm:

The 1-g and 10-g SAR test exclusion thresholds are determined by the following:

1. For 100 MHz to 1500 MHz: {[Power allowed at numeric threshold for 50 mm in step a)] + [(test separation distance – 50 mm) * (f(MHz)/150)]} mW
2. For > 1500 MHz and ≤ 6 GHz: {[Power allowed at numeric threshold for 50 mm in step a)] + [(test separation distance – 50 mm) * 10]} mW

c) For frequencies below 100 MHz:

The following may be considered for SAR test exclusion:

1. For test separation distances > 50 mm and < 200 mm, the power threshold at the corresponding test separation distance at 100 MHz in step b) is multiplied by [1 + log(100/f(MHz))].
2. For test separation distances ≤ 50 mm, the power threshold determined by the equation in c) 1) for 50 mm and 100 MHz is multiplied by ½.
3. SAR measurement procedures are not established below 100 MHz. When SAR test exclusion cannot be applied, a KDB inquiry is required to determine SAR evaluation requirements for any SAR test results below 100 MHz to be acceptable.

2. SAR Test Exclusion Thresholds

We use 5mm as separation distance for calculations.

Bluetooth DTS:

2.4G SRD:

Operation Frequency: 2410 - 2468 MHz, conducted power comes from the following calculations:

Conclusion

For the max result: 0.3150 ≤ 3.0 for 1g SAR, No SAR is required.

Note: SRD 2.4G and BLE cannot be launched at the same time.