The infrared dome security camera combines with the latest Sony CCD Digital Signal Processor (DSP) technology external adjustable 4-9mm Vari-focal lens and 540 lines of high resolution. The elegant dome camera provides an adjustable view with the support of build-in 4 - 9mm vari-focal lens. Viewing angle and the focus of the lens can be adjusted through external screw gears. The IR sensor turns on the 36 infrared LEDs as the light conditions drop delivering color images in daytime and automatically switches to black & white images at night. Besides the tri-axis enclosure design allows you to change the direction that the camera is facing without taking it apart.