Entry Level DVRs
The VHA-04L supports up to 1440 x 900 VGA resolution and normal & event recording, NTP & email alarm functions. Digital zoom during preview, playback and PTZ mode as well as full playback function.
The VHA-08R & 16R have a H.264 compression format and integrated embedded RTOS & Processor. They have multi PTZ control with alarm checking on a single board plus 8 or 16 channels.