Waterproof Bone Conduction Swimming Headphones Black Color Waterproof bone conduction swimming headphones in black. Designed for swimming, with IPX8 level waterproofing, they can be submerged in water for 24 hours and are safe to use when swimming. Equipped with Bluetooth and 32GB of storage space, these headphones have a built-in memory of 32g, which allows you to store more than 1800 songs. They offer clear bass sound and an ergonomic fit for comfort. They have a magnetic charging system. The battery is made of lithium polymer with a capacity of 230mah. The charging time is 2 hours and the music playback time is 6 - 10 hours. The talk time is 5 - 7 hours and the wireless transmission distance is 10 - 15 meters. The weight of the headphones is 29 grams. They are made of ABS + PC and feature a titanium alloy inner skeleton. The dimensions are 125*103*63mm.