Compact, easy to use detector for safe and reliable drilling in walls. Detects ferrous metal, non-ferrous metal and live wires. LED 'traffic light' system indicates where drilling is possible. Green light where it is safe to drill, amber light for caution (drilling not recommended) and red light shows where not to drill. One-button operation. Detects Ferrous Metals, Non-Ferrous Metals & Live Wires LED Indicators Max. Ferrous Detection Depth: 70mm Max. Non-Ferrous Detection Depth: 60mm Max. Live Wire Detection Depth: 50mm Auto Power Off in 10 Minutes Audible & Visual Alarm Automatic Calibration Detects Ferrous Metals, Non-Ferrous Metals & Live Wires LED Indicators Max. Ferrous Detection Depth: 70mm Max. Non-Ferrous Detection Depth: 60mm Max. Live Wire Detection Depth: 50mm Auto Power Off in 10 Minutes Audible & Visual Alarm Automatic Calibration