3 in 1 metal detector is designed with voltage detect function. It has rapid detection of the central position of the stem, with LCD screen for easy read. The center of the stem can be detected with wall thickness within 1/2 inch(13mm). The center of the stem can be detected with wall thickness within 1 inch(25mm). The center of the stem can be detected with wall thickness within 11/2 inches(38mm). Can detect iron, lead, aluminum and other metals, wall thickness within 2.36 inches(60mm). Detectable live wires in the wall, wall thickness within 2 inches(51mm). All detection functions have automatic correction and AC warning function. Made of ABS material, it is harmless, environmentally friendly and durable. The length of the finder is 69.5mm, width is 30mm, height is 154.7mm. This sensor can be used to detect wall studs, metal pipes, and electrical wires. Item Name: 3 in 1 Metal Detector Material:ABS Batteries: 1 x 6F22 9V Battery (Not Included) Operating Temperature: 0 - 40 degrees Celsius Size Details: Size: 69.5mm x 30mm x 154.7mm/2.73" x 0.18" x 6.09" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 X 3 in 1 Metal Detector Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin