True graded wireless one-to-four handheld microphone

Receiver parameters---
Number of channels: 4 channels
Panel display: LCD LCD display shows the working channel, working frequency, signal strength, current power
Carrier frequency band: UHF640MHz-830MHz
Modulation Method: Broadband Frequency Modulation (FM)
Oscillation mode: PLL frequency synthesis
Frequency stability± 0.005%
Number of channels: 200
Frequency band width: 50MHZ
Frequency interval: 125KHZ
Maximum frequency offset: ±70KHZ
Sensitivity: S/N80dB at 6dBv input
Distortion: ≤0.3% @1KHZ
Signal-to-noise ratio: 2108dB
Frequency response: 65HZ-18KHZ±3dB
Volume adjustment: The output level can be adjusted at will
Silent control: Independent "audio code and noise lock" dual mute control
Output sockets: XLR balanced and 6.3 unbalanced sockets
Reception distance: about 100 meters (open space)
Power supply: DC 1000mA 12V

Microphone Parameters---
Carrier frequency: UHF640MHz-690MHz
Oscillation mode: PLL frequency synthesis
Frequency band width: 50MHZ
Adjustable frequency: 200 pcs
Maximum frequency offset: ±70KHZ IR counterfrequency
Frequency modulation mode: output power 30mW
RF stability: ±0.005% pickup head dynamic coil
Battery: AA*2 Approx. 8 hours
Working current: ≤100mA