The BlueAnt Z9 is a noise-cancelling Bluetooth headset that distinguishes itself by providing a large number of built in features while competing on sound quality. Similar to the Jawbone or other noise cancelling headphones the Z9 attempts to eliminate background noise in both the hearing and speaking directions. For the hearing noise cancellation there are two modes with different strengths that BlueAnt claims are to be used in the appropriate situations: normal for regular situations, and "MAX" for especially noise environments. Despite the Z9's limited number of buttons - only 3 - the headset itself carries a large number of capabilities. For example. redialing is accomplished by holding the "volume up" key for 3 seconds.