1, Fully Waterproof - Submersible to 100 feet underwater, with fluorescent Orange color to add visibility underwater.Perfect for snorkeling and scuba diving.2, Easy to Install and Use - Turn on by simply installing the battery and holding the coil side up for a few second. 3, Metal Detector Designed To Realize The Conversion Between Three Mode- Vibration Mode(Silent), Audio Mode, Vibration And Audio Mode. There Are Three Sensitivity Levels With Different Audio And Vibrate Alert To The Different Distance Between Sensor And Object. 4, High Sensitivity - The metal detector has maximum sensitivity for improved detection of nuggets and other small targets. The unique sealed design allows detecting in any environment including grass, mud, dirt, sand, black sand, or even in water (Whether in fresh or salt water).5, Power supply- 9V battery*1, If no metal is detected within five minutes, the unit will automatically turn off. Built in low battery sens6,Please note: Before putting Pinpointer into the water, you must make sure that the battery cover has been tightened and sealed to prevent water leakage from damaging the machine. 7, [WHAT YOU GET] Fully waterproof metal detector set1* Metal Detector +1* 9V Power+1* Hanging Wire+1* English User Manual.