DAHUA 4CH 2MP XVR DH-XVR4B04-V2 1080N HD CCTV DVR Security Camera Security Camera  (256 GB, 4 Channel)

DAHUA 4CH 2MP DAHUA XVR DH-XVR4B04-V2 1080N HD CCTV DVR Security Camera. CCTV, which stands for Closed-Circuit Television, is a video surveillance system used to monitor areas for security purposes. Unlike broadcast television, the video signal from CCTV cameras is not publicly transmitted, but rather sent to a limited set of monitors or recording devices. Recordings are captured and stored on a Digital Video Recorder (XVR) or Network Video Recorder (NVR). These devices allow playback of footage for later review. The core of the system, they capture video footage of the monitored area. Live footage or recorded videos can be displayed on monitors at a designated security station or even remotely on authorized devices.