... space 4 support windows 2000,XP,vista Product Introduction:The 2 lines recorder box is strong redording funtion,including inbound ... 8201 recording box can reach that record automatically and manage.2 TYH-8201 can automatically compatible FSK and DTMF signal, ... outlying signal effectively, make recording more clear, use high-performance AGC alogorithm processor, reach perfect volume balance anywhere.