Handheld Metal Detector Examination Room Mobile Phone Security Detector 1. Mainly used for school and factory security inspections where sensitivity requirements are not high. 2. When detecting and scanning metal, an alarm sound and vibration prompt will be emitted, and the power supply will have a low voltage indication. 3. Simple operation, easy to save, low failure rate 4. The sensitivity can easily detect a metal object the size of a pin (or even smaller). The sensitivity can be adjusted according to on-site requirements. 5. It has simultaneous sound (or vibration) and light alarm functions when metal is detected. 6. Use battery and can be connected to an external charger (charger optional) 7. Detection sensitivity: detects RMB one-yuan coins, the detection distance is 5cm 8. Power supply: 9V square battery (6F22ND battery) Note: not included 9. Working current: sound and light less than 56mA, vibration less than 90mA 10. Overall dimensions: 35x14x3 cm 11. Net weight: 185g