... 1 line USB phone call recorder box,recording all incoming and outgoing call descriptionThe 1 lines recorder box is strong recording ... , exhale number, etc.It is designed by YX Co.,LTD,with FSK and DTMF.And the recorder support compressed format,just like 64kbs,8kbs ... day dialing 8 hours all recording just need less hardware, and have senior management functions, anytime retrieval, any time play, very ...