Highlights: Excellent housing with aluminum alloy cover Built-in microphone Compatible with Apple iPhone 4, iPhone 3G/3GS & other enabled Bluetooth enabled mobile devices Specification: Dimension: 5x 1.5x 1.8cm Weight: 0.006kg Bluetooth standard: V2.1, class 2 Supported profiles: Headset, Hands-free Built-in rechargeable Li-ion battery Operation range: Within 10 meters Talking time: about 4 hours Standby time: about 100 hours Package Contents:1x Bluetooth headset 1x 110V~240V AC charger (EU plug or UL plug which depends on our inventory status)1x Mini USB (Universal Serial Bus) adapter for quick charging 1x Chinese/ English manual 1x Ear