Features: 100% brand new and high quality Stud finder wall scanner uses advanced sensor technology for accurately and quickly locating studs wood metal AC wires. Digital LCD Display and Audio Alarm, the stud finder comes with large LCD display and audio alarm to help detect the accurate location of the objects, besides display detection mode, center pointing, low battery indication etc. Auto-calibration provides maximum reliability and accuracy for you. Easy-to-read LCD display, in stud/deep mode, put it on the wall where you want to detect to calibrate it; In AC/Metal mode, put it in the air to calibrate it. The stud finder quickly locates wood, metal and AC wires hidden in the walls, floors and ceilings of the house. It's a safe drilling tool to help you avoid potential serious issue when you install TVs, cabinet etc. It can also help you find accurate studs when installing TVs, bathroom cabinets, cabinets, photo frames, garage frames, and decorating houses. Package Includes: 1 x Wall Detector Specifications: Material: ABS Size: 17.3x7.7cm/6.81x3.03inches note: Please allow 0-1mm errors due to manual measurement, make sure that you do not mind before you order.