First Alert NC1641F4-360 16CH HD 4TB NVR Surveillance System with 360 & 4 x Bullet Cameras (Black) 360 technology displays a 360-degree vantage point with no blind-spots Significantly reduce installation time, just one 360 Camera can equal up to 5 typical cameras Includes four outdoor rated HD 1080p bullet cameras to provide added coverage to your home or business both inside and out A large capacity pre-installed hard drive allows you to capture and store up to 4TB of video files Free mobile app for remote connectivity, compatible with iOS and Android devices