CCTV Cameras installed by us are from reputed Companies like Hik-vision, CP-Plus, Secure-Eye.
There are several factors to consider when selecting a DVR. The most important factors to look at are the number of cameras supported, hard drive space, network connection / remote viewing capability, motion detection, scheduling, and ability to save video and audio to a CD or flash drive. You should also look for audio support.
a surveillance hard drive forms a central component to the digital storage of surveillance video. It can be used in a DVR, NVR, Video Server or a Video Management System in order to work 24 hours a day and 7 days week. These hard drives need to be always active, in order to keep video evidence live.