Features: <br />- Good sound quality， stereo sound<br />- With line control to adjust the volume， very practical<br />- Strong 3M adhesive on back of the headset can be fixed inside the helmet， very durable<br />- Use together with a helmet， easy to talk<br />- Universal， suitable for mobile phone with 3.5mm diameter four pin plug <br /><br />Color: black<br />Material: ABS<br />Model: CS-053<br />Headphones diameter: about 3.7cm<br />Four-pin plug diameter: 3.5mm<br />Cable length: about 1.2m<br />Headset microphone sensitivity: -58DdB ± 3dB<br />Headphone impedance: 32Ω ± 15%<br />Frequency range: 20-20kHz<br />Volume control keys: Yes<br /><br />1 x Motorcycle helmet headset with microphone<br /><img src="http://img6.eachbuyer.com/x9/p100/cq289_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cq289_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cq289_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cq289_4.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cq289_5.jpg" />