Digital Video Recorder Kit, Camera Design Turret, Number of Cameras Included 4, Maximum Focal Length 2.8 mm, Camera Resolution 1080p, Camera Operating Voltage 12V DC, Internal Memory Capacity 1 TB, Components Included DVR, Power Supply, Remote Control, Maximum Viewing Angle 107 Degrees , Camera Diameter 3 1/2 in, Camera Height 4 1/4 in, Camera Length Not Applicable, Camera Pixels 1920 x 1080, Camera Width Not Applicable, Color Display Color, Features Supporting HD-TVI/AHD/CVI/960H Cameras