三合一探测器，金属，木头，电压探测仪

3in1 Metal , Stud and Voltage detector TH100

1. Accurately locates hidden metal pipes, live wire, stud and wooden frames 
2. Detects metal up to 75mm depth 
3. Detects voltage up to 75mm depth 
4. Detects wood up to 18mm 
5. Auto calibration metal, voltage and stud detection 
6. Audio and visual indication 
7. Operated by one piece of 9V battery (battery not included)

三合一探测器 ，金属 , 木头，电压探测仪
1)单片机控制，测量更**
2)液晶显示
3)测量墙壁后梁柱，金属管道，带电火线电压
4)金属或木头梁柱较大测量距离18mm，30mm两檔
5)金属管道较大测量距离75mm
6)带电火线较大测量距离150mm