General Spec Model A-02 Sound excellent super bass stereo sound Earphone Type bluetooth headset Bluetooth support bluetooth V2.1 Cord wireless Button one button on the top of headset for answering the incoming call or making a call freely and conveniently Transmission Distance 10 meters Compatibility compatible with all Bluetooth enabled mobile phones. Others come with an ear hook for easy carrying with you on the go Features Excellent stereo sound. Both headset and hands-free profile integrated. Let you enjoy outstanding sound and music anytime and anywhere. Allow you to answer the incoming call or make a call freely and conveniently. Compatible with all Bluetooth enabled mobile phones. Comfortable to wear on the left or right ear. Come with an ear hook for easy carrying with you on the go. Specially designed for Apple iPhone 4G.