MPEG4 compression NTSC / PAL Video system Linux operation system Full-D1 live monitoring, each or quad display High-resolution playback picture quality BNC 4 channel video inputs and BNC 2 channel video outputs RCA 2 channel audio inputs and 1 channel audio output Recording frame rate: NTSC: Max. 60 fps / PAL: Max. 50 fps Display frame rate: NTSC: 120 fps / PAL: 100 fps Display resolution: NTSC: 720x480 / PAL: 720x576 Record resolution: NTSC: 720x240 / PAL: 720x288 Record mode: continuous / time schedule / motion detection / sensor triggered HDD interface: SATA, one fixed HDD rack supports up to 500GB HDD Playback search: Time & Date, Event list USB for PC playback & backup / USB 2.0 PTZ: Built-in RS485 port Network: RJ45, TCP/IP, DDNS, IE based control DVR Sensor & Alarm: 4 channel inputs / 1 channel output Remote control included Power supply: DC12V, 3A(adaptor included)