BFU- Wavetooth IPX8 BT Waterproof Bluetooth Headset, 3 meters in water for 24 hours, Operating 13 Hours and Stand By 300 Hours. Find Update Version "Wavetooth 2-necklace" IPX8 BT Waterproof Bluetooth Headset 3 meters in water for 24 hours Operating 13 Hours Stand By 300 Hours