The Z9i brings some additional functionality through mulit-point phone connections and certainly more connectivity. The Z9i can connect to two phones at the same time and switch between active calls on each phone. In addition to the two phones, the Z9i can also connect to three other devices making it a "one headset for all your needs" kind of device. Although it's very small, the dual microphones provide very good voice quality and noise cancellation in loud environments.



Link: BCC Hardware