Fangrui Product Details 1. Esh-10 Handheld Metal Detector Product Security Detection Detector 2. Frequency: 30khz 3. Reset Time: 0.5s, Automatic 4. Battery: 9v Alkaline Or Lithium Battery (not Included) 5. Power Consumption: 270mw 6. Operating Current: Less Than 50ma 7. Alarm Mode: Sound And Light Synchronization Alarm Or Vibration Alarm 8. Alarm Indication: 9. - Continuous Yellow Led: Has Detected The Target 10. - Alarm Signal: Sound Mode, Buzzer, Red Led 11. - Flashing Green Led: Power On 12. - Vibration Mode: Vibration And Red Led 13. - Flashing Red Led: Low Voltage Indication 14. Weight: About 290g 15. Size: About 37.8 X 8 X 3.5cm 16. Features: 17. Simple And Easy To Operate, Can Detect All Kinds Of Metal Objects Hidden In The Human Body 18. Fine Workmanship, Lightweight And Portable, Wear-resistant And Durable, Large Detection Area, Rapid Response 19. Free Choice Between Sound Alarm And Vibration Alarm Switch 20. Simple To Use, Three Gears: On Key, Sound Alarm Key, Vibration Alarm Key 21. Low Voltage Indication 22. Easy To Change The Battery 23. With Charging Jack 24. Safety: Harmless To Cardiac Device Wearers, Pregnant Women, Floppy Disks, Film, Video Tapes, Etc.