Thank you for viewing my items for sale. This is a checker that uses a special sensor to check for studs behind walls. It's a three-in-one device that detects metal, wood, and AC power! It's convenient when attaching heavy objects to walls or installing fire alarms, etc. Size: Approximately 150 x 70 x 34mm Power: 9V battery (*Battery not included) Mode types: Wood mode, Metal mode, AC mode [Maximum detection depth] Wood: 38mm Metal: 76mm AC power: 76mm *Detection depth varies depending on the material and size of the object, as well as the material and condition of the detection surface. *The detection depth may appear shallower for wires that are not energized. 2 pieces for 6960 yen. If you are interested, please leave a comment. ★Condition★ New ☆Shipping☆ Free shipping Simple packaging Shipping method will be determined by me. Other delivery methods are available upon request, but the buyer will be responsible for the cost. There may be scratches or stains due to storage and logistics. Includes shipping #New #Battery-powered digital stud sensor Wall stud detector Wood/Metal/AC mode equipped