Type: Sport bluetooth in-ear earphone | Bluetooth version: 4.1 Connectivity Type: Wireless | Eaffective Range : Within 10 meters Microphone: Built-in | Battery: 3.7v/80 mAh Talktime: Upto 4 hours | Music Time: Upto 3-4 hours | Standby Time: Upto 8 hours Rechargeable: USB micro cable | Charging time: Upto 1 hour