VMAX A1 G4 Universal HD over Coax® DVR records HD-Analog, HD-TVI and standard coax up to 5MP resolution, 4ch, 4TB, 120fps real-time 30fps recording, Up to 5MP recording resolution at 48fps, 4 audio inputs, 1 audio output, 4 sensor inputs, 1 relay output, 4K (3840 x 2160) True HD, VGA and Spot video outputs,Free C3 CMS Software, Free Mobile for IPhone, IPad, Apple TV, Android Smart Phones and Tablets, MAC Compatible, USB Backup, Free DDNS, Watermark Images, Help Menu, Email and Text Event Notification with Snapshot, PTZ Control, Quick Setup Wizard, Pathfinder auto port forwarding, 5 Year Limited Warranty, NDAA/TAA compliant, 5 year limited warranty.