4K 12 Channel XVR works as an 8 Channel Analog DVR for CVBS, AHD, CVI, and TVI cameras over coax + 4 IP cameras Sold without a hard drive or cameras (only DVR). You can add 1 Internal 3.5' SATA or 2.5' SSD HDD up to 10TB 3840x2160 (8MP) resolution view, recording at 1-30 fps 4K HDMI output to add an HD monitor, VGA, and SPOT OUT (CVBS) for a call monitor. Motion, Sound, PIR, Intelligent Detection, Scheduled, Manual, andContinuous Recording Audio & Alarm wired inputs, outputs to add external devices, RS485 (to connect computers and remote to navigate PTZ - Pan Tilt Zoom - cameras), Upload images, footage to Cloud (Dropbox or Google Drive) PC, Mac compatible software, Camius View iOS, Android smartphone app Remote access with a free P2P peer-to-peer code or DDNS port forward The latest recommended cameras by Camius are analog FB4KAOC; IP - SPOT828A-R, IRIS528R, BOLTX5R, and BOLTX536R. Text/Call Camius @ (424) 543-4474 (M-F 9am-5pm Pacific) or via Camius.com/support