GranVela S530 Bluetooth 4.1 Earhook Sport Earbuds, Wireless In-Ear Headphones with Microphone and IPX4 Sweatproof Noise isolation Earphones for Running Gym - Black Equipped with latest Bluetooth 4.0 technology that is universally backward compatible to all the Bluetooth enabled devices to offer HD acoustic sound, dynamic music listening experience, and eliminating call drops. Advanced Sweat Protection : Water never stands a chance, thanks to IPX4 water resistant protection against body sweat and wet weather conditions Connect Two Devices : You can seamlessly switch between your business and personal phones. Won't miss any calls! Excellent Battery Performance : Up to 6.5 hours of continuous talking / music time and up to 240 hours of standby with a single charge, saving more time for fun! Superior Design : Ergonomically designed to comfortably fit the contours of your ear, soft ear hooks and interchangeable ear tips keep the earphones in place while walking, running, and exercising