... , DELPHI, PB, C++Builder. Detailed Product DescriptionUSB telephone recorder, telephone recording box, PC based, high compress, WAV, include device, cable, connecor, ... other to record.single box offer two telephone record connection which can work independent, offer press control, voice and key control ... system, the content can be saved more than one yearone box has 2 ports, can put 2 boxes on one ...