... .supports every standard video and audio signal 4.good price 4 channels mpeg2 encoderFeatures1.Support 4: 2: 0 coding2.Hi-Fi audio ... , stereo input.3.Output code rate Fixed or Variable, flexible in use.4.Abundant input/output interface, realizing free connection.5.SDT information ... (Storage)Power110-220VAC±10%,50Hz/60HZ,25W COL5141A MPEG2 Encoder (4 in 1 out),4 channels mpeg2 encoder, catv headend