Fangrui Product Details 1. Hs-10 Handheld Waterproof Metal Detector Lcd Display Metal Positioning Rod 2. Details: 3. Power Supply: 9v Battery (need To Buy By Yourself) 4. Alarm Mode: Sound, Vibration 5. Measuring Range: 6.5-7 Cm 6. Detect Metal Size: Coins 7. Weight: About 200g 8. Size: About 28x4.5x2.2 Cm 9. Working Environment: -20-60 Degrees Celsius 10. Scope Of Application: Security Check, Treasure Hunt, Underwater Detection, Etc. 11. Features: 12. Small And Portable, With Lanyard, Easy To Use And Operate 13. 360-degree Omni-directional Scanning, Good Stability And High Sensitivity 14. The Front Probe Is Equipped With High-brightness Led Light 15. The Switch Can Adjust Three Detection Modes (soundvibrationsound Plus Vibration) 16. With A Screen Display, Visual Detection Signal Battery Power, The Closer The Metal, The Higher The Signal Indication 17. Instructions For Use: 18. Power On: Press The Switch Button To Beep Twice And Then Turn On The Machine, And Then After A Second Beep, The Metal Can Be Detected 19. Shut Down: Press And Hold The Button For 2 Seconds And Then Shut Down After 3 Beeps 20. Low Battery Shutdown: When The Battery Voltage Is Lower Than 7v, The Buzzer Will "didi", "didi" And "didi" Beep Three Times And Then Shut Down 21. Automatic Shutdown: When No Metal Is Detected For 5 Minutes, It Will "di" "di"..... Shut Down After 10 Beeps, If Metal Is Detected During The Beep, It Will Re-enter The Next 5 Minutes 22. Adjustment Mode: Short Press The Button To Adjust The Mode When Starting Up. A Sound Mode, B Vibration Mode, C Sound Plus Vibration Mode, D In The Power-on State, Double-press Twice To Turn On The Light, Double-click To Turn Off The Light, The Mode Has A Memory Function, The Last Shutdown Mode Is The Next Startup Mode