Highlights Blocks 4 Times The External Noise Crystal Clear Sound With DSPHigh Performance With Bluetooth V2.1 Supports Headset, Handsfree, A2DP & AVRCP Profiles Works With Most Bluetooth Enabled Phones Features Chipset: CSR BC5 V2.1 Support: A2DP, AVRCP, Headset, Headfree, Noise-Canceling, Voice-Dial/ Mute Broadcast Range: 10M Talking Time: 12 hours St&-by time: 250 hours