1. Detects all conductive metals including ferrous, non-ferrous and stainless steel.
2. 15 level detection light (green-yellow-red).
1. Circuit: automatic self-tuning transmitter-receiver never requires adjustment. 2. Operating Frequency: 95 KHz. 3. Audio Frequency: 2000Hz warble stone. 4. Voltage: 6.8 to 10V DC. 5. Current: 12mA typical. 6. Battery: 9V standard or alkaline battery. 7. Level detection light: 3 sections, 15 numbers indicate light (green-yellow-red). 8. Weight: 480g. 9. Size: 420(L) x83 (W) x45 (T) mm.