The Universal Wireless Bluetooth 3.0 Sports Stereo Earphones Back Headphones Headset stays comfortably around the back of your head， offering you an enjoyable music journey and convenient handsfree experience. It uses Bluetooth 3.0 to stream audio from Bluetooth-compatible devices like smartphone and tablet. High-grade driver units reproduce quality stereo sounds for a higher level of listening pleasure. Inbuilt microphone is sensitive enough to pick up voice clearly. Well-positioned control buttons allow for easy control over calls and music play. Plus， ergonomically designed earplugs fit into your ears without letting you feel painful. Click and get one!                                    Features             Bluetooth 3.0， 10m long transmission distance<br> Stream audio from Bluetooth-compatible devices like smartphone and tablet<br> High-grade driver units reproduce quality stereo sounds<br> Inbuilt microphone is sensitive enough to pick up voice clearly<br> Well-positioned control buttons allow for easy control over calls and music play<br> The headband stays comfortably around the back of your head<br> Ergonomically designed earplugs fit into your ears<br> Built-in rechargeable Li-ion battery for up to 5 hours of talk time <br>                                                            Specifications             Color     Black    <br> Support System     All Systems    <br> Material     ABS    <br> Color     Black    <br> Weight     0.6oz / 17g    <br> Dimensions     (5.7 x 4.33 x 0.78)" / (14.5 x 11 x 2)cm (L x W x H)    <br> Transmission Distance     >10M     <br> Battery     Built-in Li-ion Battery     <br> Battery Capacity     150mAh    <br> Charge time     1 ~ 2 hours     <br> Lasting Talking Time     Up to 5 Hours    <br> Bluetooth Version     3.0     <br> Microphone     Yes    <br> Communication     Wireless       <br>                                                             Package Includes            1 x Bluetooth Headset <br>1 x USB Charge Cable<br>