1.AHD DVR not only can be connected to AHD million analog HD camera, but also connected ordinary analog camera, you can switch in the mode of choice 720P and D1 mode. 2.AHD DVR and traditional analog DVR operation exactly the same, in line with user habits; no need to set, plug and play. · 3.Please confirm that the battery voltage is between 8V-36V. If surpass the range, it would burn the ...