... ,XP,vista 4)analog telephone usb recorder box 1 line usb recorder box descriptionThe 1 lines recorder box is strong recording funtion,including ... by SKYLINE Co.,LTD,with FSK and DTMF.And the recorder support compressed format,just like 64kbs,8kbs.It is benefit ... the callers in the black list call in, the call reminder window will notices you that telephone number has been set ...