IPX8 in-Ear Swimming Headphones Waterproof headphones with in-ear design. Wear more comfortable fit ears, not only will not appear like bone conduction headphones long time vibration will cause discomfort in the cheekbones, but also can effectively avoid water into your ears while swimming IPX8 in-Ear Swimming Headphones Equipped with IPX8 rated waterproof earbuds, water can not enter the ear canal, you can clearly hear the music played by the headphones underwater Bone Conducion Headphones water enters the ear canal,music sound is disturbed anc has a murmur Bone conduction headphones vibrate causing discomfort in the cheekoones Local Player(MP3 Mode) and Bluetooth Two Modes MP3 Mode MP3 Mode designed for swimming, make you enjoy music while swimming underwater. Bluetooth Mode Bluetooth Mode make you enjoy music when running, cycling, workout and other daily sports. IPX8 Waterproof Headphones with Mic for Swimming, Cycling, Drving, Gym, Workout The way to upload a song is as follows Please use the provided data cable usb port to connect to the computer, and drag and drop the downloaded songs on the computer directly into the headset memory. NOTE: only supported media format is MP3、WMA、APE、FLAC please convert other incompatible formats before downloading