Wireless mic
1:used widely
2:wireless
3:Superheterodyne Second-conversion

Model ZH-9020 

Name:Wireless mic 

Specifications:

 Frequency range :730-870MHz
Adjustable number of channels: 96
Oscillation mode: PLL Frequency Synthesizer (PLL)
Frequency stability: ± 10ppm
Receive mode: Superheterodyne Second-conversion
Receiver sensitivity:-90dBm
Audio Frequency Response :40-18000Hz
Harmonic Distortion: ≤ 0.5%
SNR: ≥ 100dB
Audio Output: balanced output and unbalanced output
Transmission power :10-30mW
Modulation: FM (FM)
Battery Specifications: 5, Battery 2
Power specification :100-240V 50-60Hz (Switch Power Adapter)
Power consumption: ≤ 10W