Brand N/A Model No Type Neckband Color White Quantity 1 With Microphone Yes Driver Unit 15mm Frequency Response 20~1600Hz Impedance 2.2Kohms Sensitivity 102dB +/-3dB Connector 3.5mm Cord Length 110cm Other Features The principle of this headphone is by changing electro-acoustic signal to sound wave and transmitting to ear through plastic air tube; Can filter distortion and other noise caused by speaker; Ear needn't to close speaker avoiding magnetic radiation and discomfort caused by magnetic heat; Air tube is transparent great for hiding; Suitable for people w/ special work such as security guard; And also suitable for KTV outdoor factory shop and construction site; Suitable for cellphones w/ 3.5mm jack such as Iphone Samsung Moto Nokia and HTC etc. Packing List 1 x Headphone (50cm air tube)3 x Spare earbuds