Only the A51-S2 series can use the parameters and datasheets listed below. The XVR firmware needs to be updated to V4.001.0000001.0.R.200908 or later in order to use the 5MP 16:9 HDCVI camera. 25 fps at 5MP (16:9 video output) maximum TVI, AHD, CVBS, and CVI switchable 3.6 mm fixed lens 20 m maximum IR length, Smart IR DC12V