Feature:1. Three Detection Modes: Audio, vibration, audio and vibration, the mode can be changed according to needs.2. IP68 Waterproof Rating: You can use this product underwater, not just limited to the ground, expand your detection space.3. Loss Alarm Function: If the button is not pressed or the device does not detect any target within 1 minute, the loss alarm will be activated. It is convenient for you to find the device and avoid losing it.4. Easy To Use: The device starts beeping for a short time, and the LED starts to flash for 30 seconds, after which, in order to save power, the device will automatically shut down.5. Rugged And Durable: Made of high quality ABS material, not easy to damage, wear resistant, long service life, and can be used for a long time.How to Use:1. Cut off the power: Press the switch button once to turn on. You will hear three beeps and the green LED will flash according to battery level. Press and hold the switch button again for more than 2 seconds, and the device will turn off. When it is turned on, it will automatically readjust. Therefore, it should be kept away from metal objects when it is turned on. If you plan to use it on wet beaches or high salinity ground, it is recommended to place the se