NVR-8580 with 2TB HDD & 4 x 4K Upscale Cameras with Heat & Motion-Sensing Spotlights. Enforcer Red & Blue Flashing Lights. Night2DayColour Night Vision & Audio NHD-875ERAmazing Image ClarityVideo to see everything thats happening by using upscaling technology that digitally creates 4K res. While not the same. these systems have a much higher res. than 1080p.Speak to SeeSpeak to See Use your voice to live stream on any Hey Google or Alexa device with a screen. including Chromecast devices. Customize & use phrases likeAlexa. show the front door.More Reliable SecurityWith Swann's True Detect. warm objects like people & cars can trigger the lights. push notifications & recording with fewer false alarms to worry about.Your Eyes OutsideMount the cameras outdoors as their weatherproof design is IP66 rated. meaning they are built to withstand rain. snow & heat. all year round.Expandable CoverageAdd up to 4 more cameras for a total of 8 to cover any blind spots. Add 4K cameras. which come