Mini Wall Scanner Metal Wall Detector Find Metal Wood Studs AC Voltage Live Wire Detect Wall Scanner Electric Box Finder                             Procuct Information:                        Features:     1. WORKS ON WALLPAPER & FABRIC: The stud finder has a depth range of 3/4-inch through drywall and works on surfaces covered in wallpaper and fabric.     2. FIND STUD EDGES: The stud finder wall scanner has the edge detection to find stud edges of both wood and metal stud.     3. DURABILITY: With shock-Resistant & Water-Resistant body for durability and long life.     4. WIDELY USED: Press and hold the button to calibrate first, then the wall scanner finds all materials different from the calibrated material.          Description:     (At 35-55% relative humidity)     1. Depth Range: 3/4”(19 mm) through drywall     2. Stud Center: ±1/8" (3mm) for wood; ±1/4"(6mm) for metal     3. Shock Resistance: up to 3 feet (1m) dropped onto concrete     4. Water Resistance: water-resistant, but not waterproof     5. Operating Temperature: +20°F to +120°F (-7°C to +49°C)     6. Storage Temperature: -20°F to +150°F (-29°C to+66°C)     7. Weight: 80g     8. Shell Material: plastic     9. Dimensions: 136x23x50mm