1. Sensitivity: A25-cent coin (60mm)
2. Iron pipe-tube in 20 to 120mm
3. Operating frequency: 35KHz
4. Operating current: Less than 8mA
5. Power supply: 6F22 9V battery
6. Low battery indicated
7. Alert: Audio & LED light
8. Tuning: Automatic
9. Temperature environment: -10 ~50 degree C
10. Dimension: 420 x 80 x 40mm
11. Weight: 450g