它集成了几个滤波器，以减少环境噪声
它还集成了AGC电路，以提高音频效果
所以设备是美妙的使用一些音频系统和监视系统
盒子可以插入墙上
该设备可以适合相机和传输音频/视频信号在一起
听距100米以上²
（顺时针运动是调高音量）
连接方法：
1，+ 12V：power'+'
2，GND：电源' - '
3，A输出：音频系统输入端口
电子参数：
电源：DC 9V-12V
散热电路：10mA
频率响应：200-10KHz
输出阻抗：600Ω
输出电平：0-6Vpp
尺寸：86mmX86mm

It have integrated several filter to reduce noise of environment
It also have integrated AGC circuit to improve the audio effect
So the equipment is wonderful to use some audio system and monitor system
The box can be insert to the wall
The equipment can be fit to camera and transmit audio/video signal together
The listen distance over 100m²
(clockwise movement is to turn up the volume)
Connect method:
1, +12V: power ' +'
2, GND: power '– '
3, A out: audio system input port
Electronically parameter:
Power supply: DC 9V—12V
Dissipation circuit: 10mA
Frequency response: 200—10KHz
Out impedance: 600 Ω
Out level: 0—6Vpp
Size: 86mmX86mm