Applicant and Manufacturer Information

Applicant: SHENZHEN LOFREE CULTURE CO., LTD

Address: 201-F4,F518 Idea Land, 1065 Bao Yuan Road, Shenzhen

Manufacturer: SHENZHEN LOFREE CULTURE CO., LTD

Address: 201-F4,F518 Idea Land, 1065 Bao Yuan Road, Shenzhen

Product Details

Product Name: FLOW 2-68 Triple Mode Low-Profile Mechanical Keyboard

Trade Mark: Lofree

Test Model: OE928

Additional Model(s): N/A

Hardware Version: OE928-VIA-V1

Software Version: 1

Power Supply: DC 3.7V by battery(2000mAh) or DC 5V 1A from AC/DC adapter

EUT Supports Function: 2.4GHz ISM Bands: Bluetooth V5. 1

Test Sample(s) Number: AB25060084-01 (Engineer Sample)

Radio Specification

Bluetooth Specification

2.4G Specification

Support Equipment

External I/O

Applied Standards

The tests were performed according to following standards:

• FCC CFR 47 part1 1.1310 - Radio frequency radiation exposure limits.
• FCC CFR 47 part2 2.1093 - Radio frequency radiation exposure evaluation: portable devices
• FCC KDB 447498 D01 General RF Exposure Guidance v06 - Mobile and Portable Device, RF Exposure, Equipment Authorization Procedures.

Test Facility Information

Test Lab: Aibo Standard Technology (Shenzhen) Co., Ltd.

Address: 101, Building B, Tuori New Energy Industrial Park, High-tech Park, Tianliao Community, Yutang Street, Guangming District, Shenzhen City, Guangdong Province, China

Tel.: +(86) 0755 85250797

E-mail: Aibonorm@aibonorm.com

Website: www.Aibonorm.com

The test facility is recognized, certified, or accredited by the following organizations:

• A2LA-Lab Certificate No.: 7514.01
• Aibo Standard Technology (Shenzhen) Co., Ltd. has been accredited by A2LA for technical competence in the field of electrical testing, and proved to be in compliance with ISO/IEC 17025 General Requirements for the Competence of Testing and Calibration Laboratories and any additional program requirements in the identified field of testing.
• FCC Accredited Lab. Designation Number: CN1411, Test Firm Registration Number: 567066
• ISED Wireless Device Testing Laboratories CAB identifier: CN0185

RF Exposure Evaluation

Limit

According to KDB447498 D01 General RF Exposure Guidance v06 Section 4.3.1 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, listed below, is 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 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 (see 5) of section 4.1). To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, typically in the SAR measurement or SAR analysis report, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting is required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for the 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; for example, handheld PTT two-way radios, handsets, laptops & tablets etc."

The SAR test exclusion threshold is calculated using the formula:

[(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
• 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 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 5) in section 4.1 is applied to determine SAR test exclusion.

Evaluation Result

Notes: 86.19dBuV/m-95.2=-9.01dBm

Conclusion

The measurement results comply with the FCC Limit per 47 CFR 2.1093 for the uncontrolled RF Exposure and SAR Exclusion Threshold per KDB 447498 D01 v06. No SAR test is required.