Freedom to exercise， move around and commute without wires to tangle or hold you back. Simplify your communications with this lightweight and versatile headset. You'll enjoy all-day wearing comfort， clearer voice transmission and superior sound quality - without wires!                                    Features                Auto - detectable， Automatic Pairring<br>    Ready when powered on<br>    Sleek and Minimalist design<br>                                                            Specifications                        Supporting Edition     V2.0 V2.1    <br>          Frequency Range     2.4GHz - 2.4835GHz    <br>          Transmission Power     Class 2    <br>          Transmission Distance     10M    <br>          Operating Voltage     3.6V    <br>          Charging Time     about 4H    <br>          Talking Time     about 3H    <br>          Standby Time     about 50H    <br>          Dimensions     4.7 x 1.5 x 2 cm / 1.85" x 0.59" x 0.79" (L x W x H)    <br>          Weight     131 g / 4.62 oz    <br>                                                             Package Includes                1 x Bluetooth Headset<br>    1 x Charger<br>    1 x Earhook<br>    1 x Manual<br>