16CH DVR 1080P*4CH, RS422, PTZ, Alarm, Network 2 SATA HD, HDMI, VGA, USB Backup, USB Mouse 16CH DVR HD-3104EVideo Input/Output: BNC 4CH In / 1CH Out, VGA 1CH Out, HDMI 1CH OutAudio Input/Output: RCA 4CH In/ 1CH OutAlarm Input/Output: Alarm 4CH In/ 1CH OutCompression Method: H.264Real time recording support:1920x1080 with 120 Fps (NTSC); 1920x1080 with 100 Fps (PAL) H.264 16CH DVR