Feature: 1. Accurate and fast: The stud detector uses an intelligent microprocessor chip with the highest sensitivity to accurately and quickly detect wood, pipes, metal and AC wires hidden in walls. 2. 5 in 1 multi functional detection: Wood Detection I: 1/2 inch (12.7mm); Wooden Detection II: 1 inch (25.4mm); Wood Detection III: 1 1/2 inch (38mm). Metal Detection: 2.36 inches (60mm). AC Detection: 2 inches (51mm). 3. LCD display and audible warning: The signal bar on the LCD display alerts you to the distance and direction of approaching objects and beeps to determine the location. This LCD display is also backlit which can provide clear display even in low light conditions. 4. Wire warning indication: When you scan in stud scan/depth scan/metal scan mode, the wire warning stays on to alert you to the presence of live AC power, which helps you avoid hazards when installing TVs, bathroom cabinets, picture frames, and garage shelves. 5. Easy to use: The device adopts a simple one click operation, which is easy to operate and suitable for decoration and renovation, indoor decoration, and construction sites. Specification: Specification: Item: Wall Scanner Main Material: ABS Display: LCD Green Backlight Screen Battery : 9V 6F22(not included) 5 level Detection Depth: Wood Detection I: 1/2 inch (12.7mm) Wooden Detection II: 1 inch (25.4mm) Wood Detection III: 1 1/2 inch (38mm) Metal Detection: 2.36 inches (60mm) AC Detection: 2 inches (51mm) Product Size: 176*72*37mm . Package List: 1 * Wall Scanner1 * User Manual