AfterShokz Xtrainerz Open-Ear Mp3 Swimming Headphones, Black Diamond (Not Bluetooth compatible)

Designed For Swimmers: Engineered to withstand all elements. Xtrainerz is fully waterproof and submersible so you can swim, run, cycle, or train harder than ever before. Open-Ear Comfort: Our open-ear design powered by bone conduction technology ensures bud-free, comfortable listening all day, in or out of the water. IP68 Waterproof: Xtrainerz has an IP68 waterproof rating and can be submerged in water up to two meters deep for up to two hours. 4GB Of MP3 Storage: Internal music storage allows for a library of up to 1,200 songs ready to play at the touch of a button. Supports MP3, WAV, WMA, AAC, and FLAC for device-free listening. (Not Bluetooth compatible) 8 Hours Of Music: With 8 hours of battery life and easy commands such as play, skip, pause, and back-a-track, you can enjoy your music lap by lap. How To Upload Audio Files To Xtrainerz: Open the USB charging cradle, insert your Xtrainerz into the charger, and close. Plug the USB end into your computer (an Xtrainerz drive will pop up). Drag and drop your fave audio files into the drive. What's In The Box: Xtrainerz MP3 Headphones USB Charging Cradle Swimming Earplugs Silicone Rubber Carrying Case