Foldable High-Precision Metal Detector OutdoorSubway Detector With Indicator Light 1. The operation is convenient. Start the device and it will start the test immediately. It is easy to operate and use 2. Beeper alarm. when the detector detects metal, the beeper will emit an alarm sound 3. Red light indication. when metal is detected, the indicator light turns red. If the buzzer sounds or the alarm indicator light keeps flashing, it indicates that the battery needs to be replaced 4. Angle adjustment: the probe can rotate 180°, suitable for more measurement scenarios 5. Widely applied in security inspection areas such as government offices, airports, stations, and examination venues that require security checks 6. Rapid detection sensing: the built-in sensing coil (if there is a metallic substance) will be detected within the detection range and immediately trigger an alarm 7. Operating temperature: -10 to +50℃ 8. Battery type: DC 9V 6F22 (not included) 9. Current consumption: less than 3mA 10. LED indicator: working and low battery indication 11. Material: steelplastic handle