The BlueAnt Z9 Dual Microphone Bluetooth Headset has a sleek and modern design which helped it win the CES 2007 Innovations Design and Engineering Award. The Z9 provides outstanding noise suppression, wind noise reduction and echo cancellation. Headset incorporates two Voice Isolation settings "Voice Isolation Standard" for use in normal everyday environments providing a natural sounding voice while removing mild background noise and "Voice Isolation Max" to provide superior intelligible voice clarity for use in extreme noise environments. Escape the noise in your world with the new BlueAnt Z9 Bluetooth Headset and talk anywhere, anytime. The translucent over-the-ear hook is comfortable and keeps the headset firmly in place, and it doesn’t interfere with glasses. Includes innovative tie clip that is integral to the headset’s design, allowing you to attach it to your shirt or cuff when not in use. Includes special feature that allows different ring-tones for known and unknown contacts. Battery life consists of a maximum of 5.5hrs of talk-time and 200hrs standby time. Uses 3.7V Lithium Polymer Battery which can be charged with the Mini USB Type A.