... 1,Digital USB Recorder 2,support FSK and DTMF single 3,calling recorder system free 4,support windows 2000,XP,vista Digital USB Recorder ... descriptionThe 1 lines recorder box is strong recording funtion,including inbound number ... SKYLINE Co.,LTD,with FSK and DTMF.And the recorder support compressed format,just like 64kbs,8kbs.It is ...