KT&C EZHD-TRF4 4 Channel HD-TVI DVR with No HDD Intelligent Video Inputs: connect 1080p/720p EZHD HD-TVI or 960H/SD analog to ANY input at any time Reuse existing analog cameras or choose any mix of HD/SD on new systems Upgrade any analog camera to megapixel at any time Superlative HD resolution of 1080p Full HD or 720p HD for amazing image quality Useful digital zoom on live view and playback