The newly improved BlueAnt Z9i is the follow up to the award winning and highly successful Z9 Bluetooth Headset.The device includes additional box contents and enhanced features. Incorporating BlueAnt's revolutionary Digital Signal Processing solution - Voice Isolation Technology™, the Z9i provides outstanding noise suppression, echo cancellation and wind noise reduction. The headset's 'Voice Isolation Max' feature further enhances the user experience in extreme noise environments.

• Winner of CES 2007 Innovations Design & Engineering Award • Two microphones for pure speech • Revolutionary Voice Isolation Technology™ produces noise suppression, echo cancellation and wind noise reduction • Separates the desired voice signal from background noise enabling crystal clear communication in the noisiest of environments • During a call, users can switch between two Voice Isolation modes - Standard and Max • Multipoint • Automatic connection and reconnection with notification • Different ringtones for known and unknown contacts • Innovative tie clip for attaching to shirt or cuff, when not in use • Stylish, translucent ear hook and rubberised metal ear hook • Firmware upgrade via USB on your PC • Small & lightweight • Up to 5.5 hrs talk-time or 200 hrs standby • Bluetooth v2.0

Check out this YouTube video that demonstrates a head shake test between the Z9 and Jawbone models:

http://www.youtube.com/watch?v=Q4393Y7q6K8&feature=related