Shinwa Sokutei Substrate Sensor and Electrical Wire LCD 79156 Pro+, Metal, Center, Deep, Detection, Display,

When installing curtain rails, shelves, picture frames, handrails, earthquake-resistant fittings, etc., you can easily find the studs behind the wall without damaging the wall. It detects metal or wood behind the wall and notifies you with a light and an electronic sound. The power line warning function alerts you to invisible power lines. When AC current is applied to the device, the power line warning symbol flashes on the LCD. Detectable substrates: wood and metal *Cannot distinguish between wood and metal Thickness: Normal mode: approx. 19 mm Deep mode: approx. 35 mm Metal mode: iron approx. 75 mm, other approx. 35 mm (wall material: plywood, gypsum board) Metal mode: iron approx. 40 mm, other approx. 20 mm (wall material: ALC board, concrete, mortar) If the wall is damp, it will not detect accurately. The included battery is a monitor battery for testing operation, so please prepare a new battery before use. (Power supply: 1 x 9V alkaline battery *Please remove the vinyl covering before use)