Deep, immersive sound, improved EQ best in class performance for wireless headphonesLatest Bluetooth technology for easy connectivity and seamless audio or video syncsAdvanced microphone system, HD voice for clear calls in windy or noisy environmentsUp to 15 hours play time with rechargeable lithium ion battery,Ear cushion:9.6 cm H x 7.4 cm WSwitch between two Bluetooth devices so you can watch a video while staying connected to your smartphone.Wireless range up to 30 ft (9 meter)Charging time: 3 hours full charge = 15 hours play time (15 minute quick charge = 2 hours play time)