<b>Not in the ear design purpose:</b> <br>Allows you to wear it all day comfortably without irritating your ears.Painless wearing headphone. <br>You can hardly feel that you are wearing this ear hook headset. <br>The external headphone can meet your daily needs: <br>answering calls, listening to music, talking while driving, exercising.No harm to your ears. <br><br><b>Specification:</b> <br>Material: ABS Shell <br>Weight: 8g/ 0.28oz <br>Wireless Version: 5.0 <br>Transmission Frequency: 2.4gHz(2402-2.4080GHz) <br>Transmission Distance: 10 meters <br>Charging Time: 2-3 h <br>Battery Capacity: 90 mAh <br>Talking Time: 5-7 hours <br>Music Time: 5-7 hours <br>Standby Time: 160 hours <br><br><b>How to adjust volume:</b> <br>Please single click the volume switch +/-, do not hold or press switch always. <br><br><b>How to change next sound</b> <br>Hold or long press volume switch +/- about 4Seconds. <br><br><b>Package include:</b> <br>2 x Wireless headset <br>1 x USB charging cable <br>1 x Detachable Ear Tip <br>1 x manual