Compress format H.264, PHILIPS PNX 1701 Chip,save more space Operating System Linux System Video Input BNC 4-channel inputs Video Output BNC 2-channel output Audio Input RCA 2-channel inputs Audio Output RCA 2-channel outputs Display Resolution PAL:720x576 NTSC:720x480 Display Frame PAL:100fps (4x25fps) NTSC:120fps(4x30fps) Record Resolution NTSC: 360×240 PAL: 360×288 Record Frame NTSC: 120fps (4x30fps) / PAL: 100fps (4x25fps) HDD Interface 1*SATA / support to 1000GB Record Mode Manual / Motion detection / Time schedule / Sensor triggered Sensor Alarm 4-channel inputs / 1-channel output (alarm) PTZ Control RS-485 Simplex/Duplex/Triplex Diplex Backup USB 2.0 port / (CD-RW/35USD, DVD-RM/58USD Extra, Optional) Network Interface RJ45, TCP/IP protocal,support LAN、WAN and motion ADSL Network Monitoring IE Remote Control IR remote control VGA Output 1-ch VGA out Power Supply DC 12V / 3A Dimension and Weight 360 x 55 x 270mm, 4kg Menu Language English