Specially designed headphones for iPhone 3G/3GS and iPhone 4G. With a balanced voice performance, comfort the sponge padand stylish appearance, this earphone becomes the first choice of game players. Simple, fashional and exquisite design offers users convenience. Compatible with portable music player. Reverting natural sound. Comes with mic for easy and convenient communication. Exact inner structure. Unique design. Driver unit: 10mm. Frequency response 6Hz-23KHz. Impedance: 32Ohm. Sensitivity: 106dB. Microphone: 4* 5mm/-40+3dB. Cable length: 1.2m. 3.5mm connecters plug jack.