The StudSensor L20 features a patented pinch grip design molded specifically to fit comfortably in the palm of your hand for a secure hold at any angle. Use to find studs to securely hang pictures, mirrors, shelves, and more! Find the edges of wood or metal studs behind walls up to 3/4-in deep to securely hang pictures, mirrors, and shelves "Ready" light indicates when calibration has successfully completed SpotLite Pointer shines a bright arrow to clearly indicate stud edge Patented "over-the-stud" indication alerts you to scan in a new location should scanning begin over a stud A brand new 9V alkaline battery is required for proper operation Color/Finish Family: Yellow Series Name: StudSensor L20 Stud Finder Battery Size: PP3 (9V) Depth (Inches): 1.36 Length (Inches): 5.33 Scan Depth (Inches): 0.75 Width (Inches): 2.14 Automatic Operation: No Battery Charger Included: No Battery Included: No Battery Required: Yes Case Included: No Detects Live Wires: No Display Type: LED Level Included: No Magnetic: No Material: Plastic Object Detection: Wood stud Sound Indicator: Yes Warranty: Limited lifetime CA Residents: Prop 65 Warning(s): No UNSPSC: 27111800