Plantronics BackBeat GO Bluetooth Wireless Stereo Headset, Retail, Black, 86800-03" because the old one "BackBeat GO WIRELESS EARBUDS: Bluetooth enabled cordless headphones allow you to lose the cord while providing an enhanced and immersive audio experience. WATERPROOF TECHNOLOGY: Earbuds are constructed with military grade technology that features waterproof and sweatproof protection for use during intense workouts. TRAVEL EARBUDS: Bluetooth and ultralight wireless earbuds easily slip into your pocket making them perfect travel headphones while still packing a full-on stereo sound. LONG LASTING BATTERY LIFE: 4.5 hours of listening time and DeepSleep mode puts the bluetooth earbuds in hibernation when not in use. COMFORT: Multiple fit options give secure earbuds for active and all-day wearing ; Operating, storage and charging temperature : 32F - 104F (0C - 40C)