Deep, immersive sound, improved EQ best-in-class performance for wireless headphones. Connectivity technology: WiredWireless Latest Bluetooth technology for easy connectivity and seamless audio-video syncs Advanced microphone system, HD voice for clear calls in windy or noisy environments Up to 15 hours of play time with a rechargeable lithium-ion battery Switch between 2 Bluetooth devices so you can watch a video while staying connected to your smartphone. Wireless range up to 30 feet (9 meters)