ahd (analog high definition). AHD camera is compatible with AHD DVR from various manufacturers. With benefits in order to mix AHD camera from different manufacturers. As long as you use an AHD DVR.
The cameras are easily connected and simple directly to AHD DVR via coal cable. Ahd camera can transmit video signal 300-500 meters.
The cameras can therefore use existing RG59 cables if older analog installations must be upgraded to AHD camera. The camera type is therefore useful for real-time monitoring, e.g. In process plants