Bone conduction technology delivers music through your cheekbones, ensuring ears remain completely open to hear ambient sounds Bluetooth version BT5.0 Bluetooth profiles: A2DP /AVRCP/HFP/SPP /BLE Battery capacity: 3.7V 230mah Talk time: 6 hours Music time: 6 hours Standby time: 300 hours Wireless range: 10meters Build-in storage memory card 8GB Waterproof IPX8