The Reolink 4K 8MP Wired Security Camera system bundle includes four (4) Bullet Cameras in a black finish; one (1) TrackMix Pan-and-Tilt Camera; and a network video recorder (NVR) with 8 channels. NVR includes a built-in 2TB hard drive (expandable up to 12TB). TrackMix camera pans in a 355° arc and tilts up/down 90° - ideal for covering front yards and other wide areas. The four bullet cameras watch entry-points and blind spots in sharp 8-megapixel clarity. Together, these indoor/outdoor cameras provide a full-coverage solution ideal for protecting your home, storefront, or office.TrackMix also features smart auto-tracking, so it follows people, animals and vehicles that come into view. Two lenses on the camera give you a wide-angle and close-up view of the object/event being followed. All cameras feature two-way audio, blaring sirens and built-in spotlights for color night vision. Add 3 more wired cameras (sold separate) plus an additional 4 battery / Wi-Fi cams - for a grand total of 12 cameras! Reolink NVR system offers pro-grade performance with no monthly fees and anytime/ anywhere access via the Reolink mobile or desktop app.