"4-inch 2 MP 25X Powered by DarkFighter Analog Speed Dome. 1/2.8"" HD progressive scan CMOS. High quality imaging with 1920 x 1080 resolution. 25x optical zoom and 16x digital zoom allows for closer viewing of subjects in expansive areas. Clear imaging against strong back lighting due to 120 dB WDR technology. 3D intelligent positioning. Switchable TVI/AHD/CVI/CVBS video output."