Enjoy Seamless Wireless Music With advanced Bluetooth 4.0 wireless connection available, you're free to stream the amazing music from any Bluetooth devices and enjoy it without any wiring troubles. Clear and Shocking Sound The wireless headphone utilizes supreme sound technology generating powerful bass, powerful and warm vocals ranging from Jazz, POP to classic with sensational sound effect. Manage Your Music with Ease The convenient buttons on the headphone allow you to adjust the volume, choose the songs, pause or play it whenever you want. Your music is definitely under your control. Crisp Hand-Free Calls The build-in microphone and speaker allows you to answer sync calls from your smart phone with only one press of the button once it is well connected. Comfortable Ear Cushion, Adjustable Headband This earphone is equipped with comfortable and soft ear cushion, adjustable and foldable headband, which makes it perfect for everyday use whether you're on the go or at home. 7 Hours Rechargeable Battery Build-in rechargeable battery which featuring up to 7 hours(70% Volume Voice) Stand-by when fully charged provides you seamless music listening hour after hour. [Every Mindkoo Product includes a 45 DAYS Money-Back & 18-MONTH Worry-Free!] Fearture: * Bluetooth Version: V4.0 * Audio Input: Bluetooth,AUX * Bluetooth Range: 5-10m * Voltage: 3.7V * Sensitivity: 105+5db at 1KHz * Output Power: 30mW mAx. * Frequency Response: 20Hz-20KHz * Battery: 280mAh * Charging Time: 2.5 Hours * Music Player: About 7 Hours(70% Voice Volume) * Talking Time: About 5 Hours * StandBy Time: About 180 Hours * Size: 18*7*18CM In the Package: 1* Mindkoo Bluetooth Wireless Headset 1* AUX Cable 1* USB Charging Cable 1* User Manual