1. It was built-in 2.4G wireless digital receiver and has more than 1000 receiver channels.
2. The transmitter could connect with receiver only in 3seconds.
3. It automatically searchs for the transmitter signal and locked.
4. No interference, no string frequency, no voice drop.
5. RS232 connector, USB port.
6. Five wired MIC input with DC6V power source.
7. With a 2.4G wireless MIC input, three AUX IN, a advanced AUX OUT.
8. With echo, volume and circuit independent adjustment, independent Treble/Bass control
9. Support DVD, VCD, CD, MP3 file to play.
10. Two group 4-channel full range power output. Acoustic feedback suppression.
11. Digital automatic reduce noise.

Specification:
Frequency Response  20Hz-20kHz
Frequency Range: 2402-2480MHz
Sensitivity: 89dB± 2dB
Audio Sampling Rate: 32kHz
Distortion: ≤ 0.2%
Rated Level Input  MIC: 15mV(unbalance )circuit: 200mV
Treble: 10 kHz± 12 dB Bass: 100Hz± 12dB
Signal-To-Noise: ≥ 86dB
Output Power: Output power: 2× 50W-300W
Channel Spacing: 5MHz
Working Voltage: AC 220V± 10%/50Hz
Dimension  : 485*260*70mm(19.10*10.24*2.76inch)
Net Weight: 4.5kg