System parameter:
1．Digital PLL circuit design, make signal stable.
2．Lock function to avoid misoperation.
3.  SMT technology for PCB installation to make quality more stable
4.  High dynamic dual-compression stream technology, loading high and low frequency signals automatic to show the dynamic characteristic.
5. Mute function and voice code lock function to suppress whistles.
6.sensor type: cardioid
7.Frequency response: 50Hz-15KHz(±2dB)
8.Sensitivity（1KHz）：-54.5dBV/Pa /1.88mV/Pa
Receiver:
1. Frequency range:500-980MHz
2. Max channels: 120
3. Receive sensitivity: 10dBu(SINAD=30dB，-103dBm)
4. S/N :>103dB(A)
5. Distortion: <1%
6. Audio output level: Balanced:400mV, unbalanced: 400mV
7. Power: DC12-16V  500mA.
Transmitter
1. Frequency range:500-980MHz
2. Frequency band width: 90Mhz
3. High wave suppression :>55dB
4. Frequency response: 50Hz-15KHz(±2dB)
5. S/N :>103dB(A)
6. Battery: 2XAA batteries
7. Battery can last 7 hours