General Spec Sound excellent stereo sound Earphone Type in-ear earphone Connector 3.5mm   Cord 1.0m MIC built-in microphone Button with a answer key for answering the incoming calls conveniently Compatibility Apple iPhone 2G/3G/3GS/4G Others packed in a transparent box Features Smart, slim and stylish. In-ear design and soft ear-pads fit perfectly in virtually any ear for surprising comfort. With a answer key on the line for answering the incoming calls conveniently. Buiilt-in microphone for talking with friends freely. Compatible with any music player with 3.5mm jack such as MP3/MP4/MP5/CD/PC etc. Specially designed for Apple iPhone 2G/3G/3GS/4G. Packed in a transparent box, easy to carry.