Features: The devices has three detection modes: audio, vibration, audio and vibration, you can change the modes for your different needs. IP68 waterproof grade, you can use this product underwater, not just limited to the ground, to expand your detection space. Lost alarm function: With this function, it is easier for you to find the device inorder o avertyou lose it, if the button is not pressed or the device does not detect anytarget within 1 minute, the missing alarm will be activated. The device starts to beep at short intervals, and the LED flash starts to flash for 30 seconds. After that, in order to save power, the equipment will automatically shut down. This device allows for a quick transformation from the scubadetector into a pinpointer, save your time and money. With the dive mode and the sensitivity has 3 level for you to adjust, you can change it for your different needs.