Mode: ZS-U2102 Box Functions: 1)Supports Windows 98/2000/XP/2003. 2)Is USB connector,Two port. 3)2/5 rate compress. 4)Support DTMF/FSK incoming CallerID. 5)Support Incoming CallerID Popup. Typical Usages: [1] Call center,Help Desk,Hospital,Fire station [2] Recording conferences calls [3] Recording instruction,Clarification of quantities and Specifications [4] Protection of staff from abusive/difficult customers [5] Monitoring nuisance callers [6] Monitoring customer service