Swann 8 Channel 6 Camera Security System, Wired Surveillance 4K HD NVR 2TB HDD, 2 Way Audio, Indoor/Outdoor, Heat/Motion Detection + Night Vision, Spotlights + Siren, Google + Alexa, SWNVK-885804B2FB This security system is packed with the latest CCTV Tech, such as weatherproof IP security cameras, night vision, push notifications, audio, sensor lights, siren and integration with Dropbox and the Google Assistant. Get amazing detail with 4K Ultra HD which is 4x the resolution of 1080P Full HD. Zoom in closer with unprecedented clarity to essential evidence like license plates and faces. True Detect thermal motion sensing triggers recording & push notifications when it detects heat from moving objects, like people & cars. The super bright sensor spotlights also turn on upon heat detection and let you see in color at night. The 2-way audio & siren let you talk back & scare off intruders. Advanced 4K video analytics, such as face detection and others, recognize elements on the image to trigger recording & Alerts, while the built-in microphone adds audio evidence. See live or playback video on your phone from anywhere with the Home safe view app. Add up to 2 more cameras for a full 8 channel surveillance. The massive hard drive stores months of footage with no fees Ever. Link your NVR to Dropbox and upload still images to the cloud for off-site storage. Power over Ethernet, POE, transmits power, video and audio via a single Ethernet cable per camera. Everything is included in the box, including 60ft (18M) Ethernet cables per camera, HDMI cable, screws and security stickers.Computer Operating System:Windows, Mac OS. Dimensions – Camera 5.94 x 2.76 x 2.76 inches