MASTECH MS6906 3 in 1 scanner is used to detects wood or metal edge， metal pipe and AC voltage hidden behind board.

Main Features:
Wood and metal stud edge detection
AC voltage detection ( 50-600V AC ) and backlight
Metal marking tip to mark location of stud edge
Operationg Range: Non-contact AC Detector 50 - 600V AC 50-60HZ
Automatism turnoff ( in 7 minutes )
Operating temperature and humidity: 0 - 50 degree centigrade
Wooden pillar / metal stud detection depth: 30mm
Metal pipe detection depth: 50mm
AC Voltage detection depth: 75mm