Noise Blackout™ Extreme technology with 2 noise-cancellation microphones• Crystal clear sound by advanced DSP technology• Intelligent volume control & audio shock protection• High performance with Bluetooth® 2.1 EDR & eSCO• Multiuse™ connects up to 8 devices—2 at the sametime• Dual wearing style with new Ultimate-fit Eargels™ &flexible ear hooks in two sizes (S, L)• Talk time: up to 5.5 hours• Standby time: up to 10.5 days• Dedicated on/off slider