This unit can be used when you want to do the following items:
1. Hang mirror, picture, cabinet, and shelves securely.
2. Install grab bar, ceiling fan, and chandelier.
3. Find metallic pipes in concrete.
4. Find electrical box, exhaust vent, conduit, rebar, and ducting.
5. Trace hot wires behind ceiling, floor, and wall.
Metal mode:metallic water pipe of Φ20mm: ≤40mm.
Voltage mode:220V at 50~60 Hz: ≤55mm
110V at 50~60 Hz: ≤30mm
Operation condition:-7°C ~ 40°C below 75% RH
Storage condition:-20°C ~ 50°C below 86% RH
Battery:9V-6F22
Dimension:150(L) x 66(W) x 32(T)mm
Weight:160g (including battery)