This Swann Smart Security CCTV System includes an 8-Channel 4K 2TB HDD NVR and 4x PRO 4K Spotlight Cameras. Reliable Wired Connection - Protect your loved ones & property with this multi-camera, wired surveillance system with everything you need to do-it-yourself or have it professionally installed See & Hear Everything in Ultra HD - See faces, number plates, packages & capture audio with state-of-the-art 4K Ultra HD, that’s 4x clearer than 1080p with powerful digital zoom, ensuring you won’t miss a thing Protection 24/7 - Know what’s happening at any hour with powerful infrared night vision up to 130ft/40m in total darkness & the ability to see colour video at night up to 115ft/35m when the spotlights are on. Heat Sensing - Swann’s True Detect™ heat & motion detection triggers video recording, push notifications and turn on the spotlights when it detects motion with heat. Set & Forget - Enjoy local recording for up to 300 days+ onto the massive 2TB hard drive with no fees ever. Save footage directly to your Dropbox account to have image evidence safely stored off-site. Prevent Unwanted Activity - The 8 Sensor Spotlight Cameras turn the lights on & trigger recording when they detect heat. The 2-way audio & siren let you talk back & scare off intruders. Depth: 230 MM Prevent Crime - Super-bright sensor spotlights & loud siren deter intruders. True Detect - Heat & motion-sensing for more reliable alerts. Colour at Night - See colour video at night up to 115’/35m with the spotlights on 4K Ultra HD - State-of-the-art video to see faces, license plates, close ups & more. Talk & Listen - 2-way audio to greet guests or warn intruders. Recognize Faces - Be alerted when the people you care about are safe. Weatherproof - Cameras work in rain & snow, all year round. Speak to See - Go hands-free with Google Assistant or Alexa. Smartphone Control - Access anywhere with the Swann Security app. Height: 64 MM Width: 300 MM