Bluetooth Version :V1.1
Frequency Band :2.4GHz-2.48GHz
Support Profiles: Headset & Handsfree
Function Button: Receiving / Hanging Up / Pairing / Turn on / Turn off
Volume Control: Volume Adjustment
Operation Range:10 Meters
Battery: Rechargeable Lithium Polymer
Talk Time: Up to 4 hrs.
Standby Time: Up to 160 hrs
Charging Time :2 to 2.5 hrs
With adjustable clip, which is easy to wear either on left or right ear.