13 in 1 multiscanner stud detector for wood, metal, and AC wires. Helps you quickly & easily locate wood, metal studs, joists, metal pipes, rebar & live AC wire behind wall, floor, ceiling. 2Features a large LCD display & sound warning to help detect the accurate location of the objects. Saves you lots of time by displaying the desired stud center & the precise position of the stud. 3Easy to use, after the battery is installed(not included), there will be a long beep when it is turned on. When it is automatically turned off, press the test button for 2 seconds to turn it on again. 4It is lightweight, longlasting and convenient to use in your home, office, workshop. Makes all of your DIY home projects easier such as mounting your TV, bathroom cabinet, photo frame, garage racks etc. 5The compact design is easy to carry and use. When the battery power is too low, it will prompt. The ergonomic design means you can hold the wall scanner in your hand comfortably.