Bluetooth version: V4.1Frequency range: 2.4GHz-2.48GHz Operating distance: up to 10m (free space) Bluetooth profiles: A2DP， AVRCP， HSP， HFP Standby time: up to 180hrs Talk / music playtime: about 5 hours Charging time: about 2 hours Language: switch English and Chineses Accessories: I6 headset x1 USB charging cable x1User manual x1