monitor

21" DVR COMBO 450 TVLINES ON-SCREEN DISPLAY/SETUP MENUS(OSD) NTSC/PAL SYSTEM HEAVY-DUTY METAL CABINET CONVENIENT ON THE FRONT PANEL PUSH-BUTTON CONTROLS DUPLEXER OUTPUT PIP/ZOOM FUNCTION FREEZE FUNCTION TIME/DATE DISPLAY A/V INPUT/OUTPUT RCA SLAVE OUTPUT RCA HDD 300GB(OPTION) TWO MODE POP FUNCTION ANTI ROLLING SEQUENCING SYSTEM TWO WAY AUDIO, BUILT-IN SPEAKER & MICROPHONE- DC POWER SUPPLY FOR 8 CAMERAS UNIVERSAL POWER SUPPLY AUDIO INPUT/OUTPUT FUNCTIONS BY WIRELESS REMOTE CONTROL ALARM IN/OUTPUT MOTION DETECTOR UL,DHHS,FCC,CE,APPORVED