Ultra High Resolution (540 TV Lines) DAY & NIGHT: Automatically selects the mode that is appropriate for daytime or night-time conditions. High Sensitivity: The built-in high sensitivity SONY COLOR CCD produces clear images even in extremely low light conditions. 0.3Lux (0.1Lux B/W) and 0.002 Lux with SENS-UP enabled. DNR (Digital Noise Reduction): Reduced noise coupled with improved signal-to-noise ratio (S/N ratio) provides a sharper, clearer image display even in the low light conditions. Eliminating the noise also reduces image sizes (when recording onto a hard drive) by up to 30%. Electronic IRIS: The electronic IRIS function enables continuous automatic control of the shutter between 1/60~1/120,000 seconds. PRIVACY Function: The PRIVACY function conceals the areas you do not wish to appear on the screen.