Key Features Reliable Wired Connection Power, video & audio run through a single Ethernet cable with Power over Ethernet (PoE) cabling making installation a lot simpler. See Everything in Upscaled 4K HD See what's happening with digitally enhanced upscaling technology that provides 4K resolution & zoom - you won't miss a thing Protection 24/7 See in the dark up to 130ft (40m) with the powerful infrared night vision which automatically kicks in as the night falls. Prevent Crime Heat & motion trigger sensor lights, mobile alerts & video recording Heat Sensing Swann’s True Detect heat & motion based PIR detection triggers video recording & push notifications when it senses motion with heat, like people & cars Capture Audio Listen to & record sound from each camera, adding another layer of evidence Wide Viewing Angle This Swann camera has a super wide 80-degree field of view to cover broad areas, so that you can have fewer cameras in your property, bringing down the cost of home security. "Show me the front door" Enjoy hands-free security using voice commands. Stream video from your camera via the Hey Google & Chromecast, Google Home Hub, or via Alexa devices with a screen, such as Echo Spot, Echo Show or 4K Fire TV. More Reliable Security With Swann's True Detect, warm objects like people & cars can trigger the lights, push notifications & recording with fewer false alarms to worry about. Free Local & Cloud Recording The massive 2TB HDD can store months of video before overwriting older files. Easily back up video to your personal Dropbox account in the cloud &/or transfer videos to a USB memory stick. There are no ongoing fees ever! What's in the Box NVR-8580 8 Channel NVR with 2TB Hard Drive NHD-876MSD Masters-Series HD Dome Cameras x 4 Ethernet Cable x 5 (60ft/18m x 4 & 3ft/1m x 1) HDMI Cable Power Adapter & Splitter Mouse Mounting Screws & Plugs Quick Start Guide Theft Deterrent Stickers *Coin/button cell battery safety information This product contains a coin/button cell battery. If the battery is swallowed it can cause severe internal burns and, in extreme cases, can lead to death. Keep batteries away from children.