iKross Wireless Bluetooth Handsfree Headset for Smart Phones Answer / End / Reject call, Comes with On/Off button. Last number redial Voice dial activate (when supported by mobile phone), Mute/Volume Control, Call waiting, Transfer a call between mobile and headset, Includes AC power adapter Bluetooth V2.0+EDR, Operation Range: 10 meters (extended), Talk time: up to 4.5 hours Standby time: up to 70hrs, Charging time: 2.5 - 4 hours, Battery: Rechargeable polymer battery Size: 67mm x 26mm, Weight: 16g, BQB, FCC, CE and RoHs approved