UK CSR Bluetooth 4.0 Chip & Advanced APT-X Tech - Ensures excellent sound quality for music enjoyment and hand-free phone calls.<br /><br />Sixth Generation CVC Smart Noise Control -  Reduces noise disturbance so you can enjoy a clear sound track.<br /><br /><br />Exercise-Proof & Sweat-proof Design - Guarantees stable and comfortable wearing when exercising， running， climbing， driving， skating，camping， fishing， etc.<br /><br /><br />Universally Compatible - Suitable most Bluetooth-enabled devices. Built-in extra-long battery allows talking/playing for up to 6 hour long. <br /><br /><br />Flat Line Design Adopted - Avoid the disturbance of twining wires and enjoy sport activities freely.<br /><br /><br /> <br /><br /><br />Specifications:<br /><br /><br />Brand: Marsboy<br /><br /><br />Model: Nice 17<br /><br /><br />Material: ABS<br /><br /><br />Color: Blue<br /><br /><br />Length: 57cm<br /><br /><br />Buttons: Volume +/- (long press to switch songs); multi-function button<br /><br /><br />Interface: micro USB<br /><br /><br />Bluetooth Version: V4.0<br /><br /><br />Bluetooth Chip: CSR8645<br /><br /><br />Sensitivity: 100 +/- 3dB<br /><br /><br />Protocols: HEP/HSP/A2DP/AVRCP<br /><br /><br />Speaker: In-Ear speaker<br /><br /><br />Speaker Sensitivity: -41dB +/- 3dB<br /><br /><br />Sound Track: Dual-Track Stereo<br /><br /><br />Respond Frequency: 100 Hz ~ 20 KHz<br /><br /><br />Play Time: up to 6 hours<br /><br /><br />Charge Time: 2 hours<br /><br /><br />Transmission Distance: 10 meters (without obstacles)<br /><br />Package Content:<br /><br />Earphones x 1<br /><br />USB Cable x 1<br /><br />Earplug x 3 pairs<br /><br />Earhook x 1 pair<br /><br />User Manual x 1<br /><br />In original package<br /><img src="http://img6.eachbuyer.com/x9/p100/ci139_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/ci139_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/ci139_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/ci139_4.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/ci139_5.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/ci139_6.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/ci139_7.jpg" />