AR954 Handheld Security Metal Detector, Detection Distance: 60mm Features: 1. Light and beautiful structure, high sensitivity 2. With a small back bag easy to carry, suitable for requiring relatively high places 3. Applications: Gold and silver jewelry, jewelry factory security and the need for a quiet school entrance examination venue mute checks. Specifications: 1. Sensitivity: A25-cent coin (60mm) 2. Iron pipe-tube: In 20 to 120mm 3. Operating frequency: 13KHz 4. Operating current: Less than 6mA 5. Power supply: 6F22 9V battery 6. Low battery indicated 7. Alert: Audio & LED light 8. Tuning: Automatic 9. Temperature environment: -10 ~50 degree celsius 10. Alarm: Vibration, sound and light alarm, with headphone output (headphones optional) 11. Detection sensitivity: Detection of one yuan coin, the detection distance 6cm and above 12. Current work: Sound and light is less than 20mA, the vibration is less than 70mA 13. Dimension: 420mm x 80mm x 40mm 14. Weight: 430g