Feature:1. [IP68 Waterproof] With the diving standard IP68 waterproof grade, the metal detector can operate reliably under the water of 30 to 60m.2. [3 Alarm Mode] The metal detector has sound and light, vibration, sound light and vibration alarm modes, used to indicate metal objects. The closer to the target, the higher strength the alarm will be.3. [Reasonable Design] The diving detector with a 5.9in coil can easily and effectively detect metal objects, and the LED flashlight can provide help in dim and low light conditions.4. [Dual Key Operation] The handheld metal detector is designed with 2 operation keys, on key for switching on and off, and one key for switching modes, simple to use.5. [USB Rechargeable] Built in rechargeable battery, you can easily charge for the metal detector with a USB cable, no need to worry about power failure. The maximum use time is 7 to 10 days when fully charged.Specification:Item Type: Metal DetectorMaterial: ABSBattery: 1 x 6F22 1600mAh rechargeable lithium battery (built in)Alarm Mode: Sound and light, vibration, sound light and vibrationMeasuring Range: Approx. 10-12cm/3.9-4.7inProtection Grade: IP68Current: 75mAPower: 375MWFrequency: 3KHZ.Package List:1 x Metal Detector2 x Back Cover Accessories1 x Lanyard1 x USB Cable1 x User Manual