It is a handheld wall detector with high sensitivity for home decoration, which could help you locate hidden metal pipes, live wire, stud and metal frames accurately when you want to dig a hole to hang a picture or install shelves. Features: Ergonomic Design: handheld and anti-slip body for comfortable and firm grip. Smart Beep Function: reminds you of the stud's location to find the stud center quickly. LCD with Backlight Display: LCD digital display to show the indication clearly. 3 Detecting Modes: stud scan mode, metal scan mode, AC wire scan mode. Automatic Calibration: adjusts the detection automatically for precise detection. With battery level indication. Specifications: Color: Yellow + Black Material: ABS *Maximum Detection Depth: Metal Rebar: 76mm AC Live Wire: 76mm Wood and Metal Studs: 38mm Operating Temperature: -20 ~ 60 degree Celsius Storage Temperature: -20 ~ 60 degree Celsius Power Supply: 1 * 9V 6F22 Battery(Not Included) Item Size: Approx. 15.4 * 6.9 * 3cm / 6.1 * 2.7 * 1.2in Item Weight: Approx. 193g / 6.8oz Package Size: Approx. 23.2 * 14.9 * 4.5cm / 9.1 * 5.9 * 1.8in Package Weight: Approx. 247g / 8.7oz Package List: 1 * Wall Detector