About This Multi-Purpose Wall Scanner: Zircon MultiScanner A200 helps locate wood studs, metal studs, edges, centers and stud direction, giving DIYers and pros clearer guidance before mounting TVs, shelves, cabinets, mirrors and fixtures Correct Calibration for Better Scans: Place scanner flat against the wall, then press and hold the Power Button; wait 1–2 seconds for the short calibration beep and do not move the scanner until calibration is complete before sliding slowly Three Modes for Precise Detection: StudScan finds wood or metal stud edges and centers up to 3/4 in. deep, DeepScan helps scan deeper up to 1 1/2 in., and Metal Scan helps locate metal behind walls before drilling Scan and Mark with Confidence: WireWarning Detection helps alert you to hot electrical wires behind the wall, while the LCD display, audio tone and SpotLite Pointer make stud edge and center marking easier before drilling Low Battery Indicator: Alerts you when battery power is too low for the scanner to work properly, so you know when to replace it with a new 9V alkaline battery with an extended expiration date for optimum performance Overview Brand : Zircon Color : Orange Batteries Required? : Yes Material : Plastic Power Source : Battery Powered