1. HOW IT WORKS: The submersible metal detector is a handheld metal detector designed to pinpoint metal (black and non ferrous) objects during treasure hunts. Used in conjunction with ground search metal detectors to help find metal targets     2. UNIVERSAL AND EASY TO USE: This detector is universal and very easy to use. Press and hold the power on for three seconds, and you can detect immediately. Both sound, light and vibration alarms are available to indicate the presence of metal objects. As the submersible probe moves closer to the metal target, the strength of the alarm increases. Submersible probes with 5.9in coils are also very effective at easily detecting even the smallest metal objects     3. SUBMERSIBLE MODE: The probe has a submersible IP68 waterproof rating, which is fully capable of protecting the environment from pollution and can even be cleaned under running water or operated reliably in water depths of 30& 8209;60meter     4. EASY TO OPERATE: The detector is designed with two keys and can be easily controlled. One key to open and close, one key to switch modes     5. DURABLE BATTERY: Rechargeable lithium battery is used instead of traditional disposable battery, and the charging interface is type c interface. There are two lithium batteries in the handle, so you don't have to worry about running out of power outdoors anymore. The maximum service life on full charge is 7& 8209;10 days         Specification: Item Type: Submersible Metal Detector     Battery: 2 x 6F22 800mAh rechargeable lithium battery     Alarm Mode: Sound light, vibration, sound light and vibration     Measuring Range: Approx. 10 ~ 12cm / 3.9 ~ 4.7in     Protection Grade: IP68     Voltage: 5V     Current: 35mA     Power: 0.315MW     Frequency: 3KHZ              Package List:     1 x Host     2 x Rear Cover     1 x Rear Cover Rubber Washer     1 x Hanging Rope     1 x USB Cable     1 x User Manual