Zircon Pro SL Series 61899 Stud Sensor, 9 V Battery, 1-1/2 in Detection, Detectable Material: Metal/Wood

Locates wood or metal studs up to 1-1/2 in deep. Red LEDs light up every time a stud edge is approached. The SpotLite pointing system, an audio alert and a green LED signals when the stud edge is reached. Should scanning begin over the over-the-stud indicator alerts the user to start the scan in a new location. TruCal technology calibrates to any wall's density and a steady green LED TruCal light alerts the user when the tool is calibrated and ready to scan.