... DTMF single 2)free calling recorder system 3)support windows 2000,XP,vista 4)1lines usb recorder box ,TYH8200 Quick DetailsPlace of ... DTMF single 2)free calling recorder system 3)support windows 2000,XP,vista 4)1 lines usb recorder box ,TYH8200 Product description: ... The 1 lines recorder box is strong recording ...