Specification:<br /><br />Size:11.5 x 5.6 x 1.0 cm<br />The USB cable length:50cm<br />With 2W speaker and high sensitivity microphone<br />Compatible Bluetooth Specification: V3.0+EDR<br />Working frequency range: ISM (2.4-2.84GHZ)<br />RF output power: Up to 10 meters<br />Battery type: lithium cell 3.7V, 600-650mah (BL-5B)<br />Talk time: up to 20 hours<br />Standby time: up to 320 hours<br />The input voltage:5V<br />The headset power:0.37W<br />The microphone sensitivity:-41DB<br />The noise:20 decibel noise reduction<br />Charge time: 2-3 hours<br /><br />How to use it:<br /><br />After switch on, Press the button on the top of the product for six seconds, the indicator lamp will alternately flash with blue and red and has the voice prompt ?° Had readied to match?± .<br />Open the phone Bluetooth function, and search for ?°BTLD-158?± and click it to contact.<br />After finish contacting, the phone will voice prompt ?°The phone one contacted?±<br /><br />what's include:<br /><br />1 x Bluetooth Hands Free Car Kit<br />1 x USB Charging Cable<br />1 x USB Car Charger<br />1 x User Manual<br /><img src="//agdetail.image-gmkt.com/m430/945/759/594759945/img/agdetail.image-gmkt.com/945/759/594759945/img/img6.eachbuyer.com/x9/p100/eb00593_1.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/945/759/594759945/img/agdetail.image-gmkt.com/945/759/594759945/img/img6.eachbuyer.com/x9/p100/eb00593_2.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/945/759/594759945/img/agdetail.image-gmkt.com/945/759/594759945/img/img6.eachbuyer.com/x9/p100/eb00593_3.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/945/759/594759945/img/agdetail.image-gmkt.com/945/759/594759945/img/img6.eachbuyer.com/x9/p100/eb00593_4.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/945/759/594759945/img/agdetail.image-gmkt.com/945/759/594759945/img/img6.eachbuyer.com/x9/p100/eb00593_5.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/945/759/594759945/img/agdetail.image-gmkt.com/945/759/594759945/img/img6.eachbuyer.com/x9/p100/eb00593_6.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/945/759/594759945/img/agdetail.image-gmkt.com/945/759/594759945/img/img6.eachbuyer.com/x9/p100/eb00593_7.jpg" />