3.5mm In-ear Headset Earphone Mic Compatible with iPhone 4 4G 3GS iPhone 4S - AT&T, Sprint, Version 16GB 32GB 64GB Enjoy Hands-free conversations with this stereo headset with On / Off switch. Includes integrated earpieces and microphone. Cord mounted ON/OFF button which lets you take calls and hang up easily. Excellent sound quality and super clear sound. Keep your hands free and on the wheel. Fits comfortable in your pocket, purse or backpack. Excellent sound quality in all ranges. Color: Gold / Black. EarBud Shape: Ball-head. Cord Length: 56 inches (1.42 meters). Impedance: 32 OHM. Maximum Power Input: 5 mW. Sensitivity: 115db (front), 102db (back). Frequency Response: 20 Hz to 20KHz.Connector: 3.5mm diameter stereo plug. Symmetrical headset cable length. Connector: 3.5mm diameter stereo plug. Symmetrical headset cable length. Accessory only.