There are many types of AHD DVR and Accessories available.
DVR0404/0804/1604LF-AST has up to 4/8/16 cameras with 1080p real-time preview
Contact Sales RepDVR0404/0804/1604LF-AST has up to 4/8/16 cameras with 1080p real-time preview, H.264 dual-stream video compression and 3D intelligent positioning with Dahua PTZ dome camera. The DVR0404/0804/1604LF-AST can Support 1 SATA HDD up to 4TB, 2 USB2.0 with Multiple network monitoring: Web viewer, CMS (DSS/PSS) & DMS
CCTV