... Telephone Recorder 1,high-impedance recording 2,Accurately judge the channel status 3,Supports AGC 4,FSK, DTMF code 8-channel Telephone RecorderTelephone recorder ... of audio, radio and carrier phone. GXUSB-R telephone recorder records with clear tone quality, is easy to ... mobile computers terminal can build a convenient-move telephone recording monitoring system.Features:1, USB interface, provides ...