... /T,L/C 3.Warranty:2 years CCTV 4 Channel USB DVRProduct Features:1. Four channels Video input, resource 25fps( ... four menus and single menu 3. Multi-alarm burst modes; transducer alarm, motion alarm, video losing alarm, HD space lack alarm ... )Compress formatMPEG4Resolving640x480/352x240(NTSC);704x576/352x288(PAL)Recording backupHDD, ZIP, USB disk, CD-R/W Working modeFour Recording Mode Common working ...