To be connected to an actual CCTV DVR, For more information please refer to :http://list.qoo10.sg/item/CCTV-IR-NIGHT-VIEW-HIGH-RESOLUTION/413451214To be connected to an actual CCTV DVR, For more information please refer to :http://list.qoo10.sg/item/CCTV-IR-NIGHT-VIEW-HIGH-RESOLUTION/413451214