This CCTV DVR keeps all recording on a hard drive so you can look at them in your free time. Regardless of the number of channels, there are 4, 8, 16 channel DVRs. The highest resolution that you can have recorded on the DVR is 8MP. The PoC (power over coax) option is also available for the users. The video signal and the power are taken through the same coax cable.