REVO America RT41B2G-5G T-HD 4-CH 5G DVR Surveillance System with 2 T-HD 1080p Bullet Cameras (White) Four (4) Channel DVR - Supports up to Four (4) cameras. HD-TVI Technology - HD video over BNC. 500GB Hard Drive Capacity - Up to 1000 hours recording time 2MP IP 66 Bullet Cameras (2) + 60' BNC Cables (2) Use/view your DVR remotely via Smartphone or Computer.