Transmission protocol: 2.4G Bluetooth protocol

Transmission distance: ≥10 meters 

(more than 10 meters in the back direction, 20 meters in the forward direction)

Sound delay: ≤25ms

Microphone: -38dB±3dB

Frequency response: 20Hz-20KHz

Sampling rate: 44.1KHz

Signal-to-noise ratio: ≥70dB

Working current: ≤12mA

Shutdown current: ≤20uA

Transmitter battery: 85mAh 3.7V

Battery life: 6H

Charging compartment battery: 600mAh

Microphone battery: 85mAh

Charging compartment input voltage: 5V-20V

(supports fast charging and high voltage input)

Current: 5V/1A

Working temperature: -10℃-50℃

Support dual microphone simultaneous recording

Wireless earphone box design

Automatic connection, plug and play