Are you a person who likes music and has a high requirement on sound quality? Perhaps the BT-222 Wireless Bluetooth V4.0 Sport Earphones with NFC are what you need. Adopting high-grade material， they feature excellent sound quality for your better audio experience. As long as you wear them， you can easily enjoy your music without being interrupted at any time and place. To our surprise， they have NFC function， so that you can share funny things with your friends face to face. How convenient it is!                                    Features             No wire wrapping for convenient use<br> As long as you wear them， you can easily enjoy your music without being interrupted at any time and place<br> Adopting high-grade material， they feature excellent sound quality for your better audio experience<br> The wireless Bluetooth earphones can free your hands， so you can listen to music and receive calls conveniently when you are doing sports<br> The NFC function enables you to share funny things with your friends face to face   <br>                                                            Specifications             Protocol Standard     Bluetooth V4.0    <br> Impedance     32Ω    <br> Frequency Response     20HZ~20KHZ    <br> S/N     ≥88dB    <br> Sensitivity     105dB    <br> Carrier Frequency     2.4G ISM， 2.402- 2.480GHZ    <br> Rated     4dBm    <br> Magnet φ     9mm    <br> Battery     3.7V 60mAh    <br> Working Time     3- 5 Hours    <br> Standby Time     110h    <br> Length of Cable     50 cm    <br> Color     Black    <br> Dimensions     (1.18 x 1.02 x 0.59) " / (3 x 2.6 x 1.5) cm (L x W x H)    <br> Weight     0.42 oz / 12 g     <br>                                                             Package Includes            1 x Sports Bluetooth Earphone<br>1 x USB Cable<br>1 x User Manual<br>6 x Headset Earmuffs<br>