This is M50 Bluetooth Stereo Headset With Wired Headsets. 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            Mini size and light weightBluetooth stereo headset provides excellent sound qualityConnecting people with BluetoothExcellent bluetooth wireless headphone allows you to make and receive calls while on the move or in the officeLogically built-in microphone as well as volume， play， pause skip， call answer and call reject control buttonsWith this Bluetooth stereo headset， you can drive more safeThe Super lightweight， comfortable over-the-ear design makes this Bluetooth stereo headphone easy to wear throughout the dayThis Bluetooth stereo headset is ideal for those who have MP3 enabled phones， because they allow the user to both communicate via the phone and also listen to music                                                            Specifications            Bluetooth Version    V3.0+A2DP    <br>Frequency Range    2.4GHz    <br>Transmission Power    Class 2    <br>Transmission Distance    15 M    <br>Power Charge    AC Input 110V-240V DC Output 5V    <br>Music Time    4 hours    <br>Talk Hours    About5 hours    <br>Standby time    more than 18 hours    <br>Color    Black    <br>Weight    4.13oz / 117g    <br>                                                            Package Includes            1 xM50 Bluetooth Stereo Headset1 x USB Cable1 x User Manual1 xWired Headsets