Mini, lightweight, compact, ultra-slim and portable design. Ultra-clear sound speaker and utmost sensitive microphone. One button on the top for control. Allow you to answer the coming call freely and conveniently. Both headset and hands-free profile integrated. Let you enjoy outstanding sound and music anytime and anywhere. Compatible with all Bluetooth enabled mobile phones. Specially designed for iPhone 4 Generation. Comfortable to wear on the left or right ear. Come with an ear hook for easy carrying with you on the go. Support Bluetooth V2.1. Transmission distance: less than 10 meters.