Receiver parameters:
Operating frequency: UHF600~650MHz (adjustable)
DC input voltage: DC12V 3000mA
Oscillation mode: Dual phase locked frequency synthesis (PLL)
Adjustment method: FM
Maximum frequency offset: ± 50KHz
Frequency response: 60Hz~18000Hz
Signal to noise ratio: ≥ 89dB
Low frequency attenuation: 125Hz 6dB/OCTAVE
Output impedance: 250 Ω
Maximum withstand sound pressure: 135dB SPL 1KHz at 1% T.H.D
Dynamic range: ≥ 105dB
S/N signal-to-noise ratio:>98dB
T. H. D distortion:<0.5%

Microphone parameters:
Transmitter structure: metal waist bag+headband
Transmitter indication: power switch indication, low voltage indication, frequency confirmation indication
Transmitter operation: power control
Frequency range: 600~650MHz
Transmission power: 10mW
Oscillatory Mode: Phase Locked Loop Frequency Synthesis (PLL)
Frequency selection: Receiver selection, infrared frequency matching to determine transmitter operating frequency
Frequency stability: ≤± 0.005%
Modulation method: FM
Maximum frequency offset: ± 50KHz
Directional characteristics: capacitive single directional
Frequency response: 100Hz-12KHz
Sensitivity: -43dB/± 2dB (1KHz)
Working power supply: DC 3V (2 No. 5 batteries)
Working current: ≤ 100mA