The KWS500 with CLI is the ideal wireless solution for small sized business looking to provide employees with an effective wrireless mobile solution. This model has the added benefit of displaying Caller ID when the handset is on hook. The KWS500 is specially designed for succesful integration through the PBX interchage. The unit is fully supported by a wide range of Polycom/Kirk handsets. It enables up to 8 KIRK handsets to be used, as well as up to 6 simultaneous conversations to take place.