BLUETOOTH ENABLED DEVICE: The Pyle Active Sport Running Headphones feature a built-in bluetooth that lets you stream music instantly from all of your devices. Compatible w/ iPhone, Android, smartphones, MP3 player & other bluetooth-enabled devices HANDS-FREE CALL: The running earbuds allow you to multitask seamlessly while you exercise. The active headset lets switch easily from listening to music to answering phone calls. The MP3 control unit detaches for charging, charges via USB port RECHARGEABLE BATTERY: The wireless sport headphones are designed for vigorous activity and w/ the sporty people in mind. Up to 6 hours of battery life & easy to push-button controls let you focus on more important matters, like beating your best time MARINE-GRADE WATERPROOF: Continue to listen to music with workout headphones without any worries. The headset is IPX8 marine-grade rated so you can go swimming, run or bike in the rain without any damage. Standby time is up to 20 hours PERFECT FOR SPORT USE: The cordless headphones are perfect for all year round outdoor exercise. The temperature range of 32°F - 176°F enables you to work out in almost any climate or season. Features one-size-fits-all headband style w/ LED indicators