Sony Lightweight Waterproof 4GB Wireless Bluetooth Sports Wearable MP3 Player Waterproof - Keep the music playing even if you're underwater. When used with the waterproof swimming ear tips, the MP3 Player is rated at IPX8, allowing use in water up to 6.5 feet deep for 30 minutes. The remote control is splashproof with an IPX5 rating Remote Control - A Bluetooth-enabled ring-style remote control lets you intuitively control your music and your workout. Easily take and make calls, choose your tracks, and adjust the volume while on the run. Its CR1620 coin cell battery lasts for up to 18 months, and it can be worn on your finger with the ring strap or on your arm with the included wrist strap Bluetooth with NFC - Connect your player to an iOS or Android device and enjoy streaming tracks from your phone or tablet, no wires required. NFC technology makes pairing with an enabled device as easy as touching them together, and the free SongPal app lets you control your MP3 player with your phone's touchscreen. The MP3 player also has a microphone, allowing you to take calls on the go Quick Charge Battery - Connect your MP3 player to the USB dock for only three minutes and get up to 60 minutes of usage Wrap-around security and comfort - Ideal for sports and active lifestyles, this unique digital music player is designed to comfortably wrap-around the back of the head and securely stay in place, so you can run, jump, and train harder. Be wire-free, hands-free, and without distraction whether youre working out at the gym, playing outdoors or even swimming