The device has three detection modes: audio, vibration, audio and vibration, you can change the mode to your different needs. IP68 waterproof rating, you can use this product underwater, not just limited to the ground, expand your detection space. Loss alarm function: With this function, you can find the device more easily to avoid loss, If the button is not pressed or the device does not detect any targets within 1 minute, the loss alert will be activated. The device starts beeping for a short time, and the LED starts to flash for 30 seconds. After that, in order to save electricity,, Manufacturer: CFWWSAQ