Features: 1. Use upgraded internal sensors. It senses changes in the density of the space behind the wall and can locate the stud center very accurately. 2. The new 5-in-1 design is more powerful, more accurate, and lasts longer. 3. This product quickly and easily locates wood metal studs, joists, metal pipe rebar and live AC wires behind walls, floors and ceilings. 4. The design of the alarm allows you to know the situation of the wall at all times, making the operation more accurate. 5. The wall detector can clearly identify what objects are inside the wall, which is more intuitive and accurate. Wood detection, metal detection, electric current detection. 6. A wide range of adaptations, as long as you want to view the interior of opaque objects, you can use it. 7. Use upgraded internal sensors. It senses changes in the density of the space behind the wall and can locate the stud center very accurately. Specifications: Model: SH301 Metal Detectors Product material: PC/ABS Product color: Silver Black Alarm Mode: Beep Battery type: 9V battery (not included) Display: LED liquid crystal green backlit screen Package included: 1*Metal Detectors