The P4 LumiIR 4MP 25x PTZ delivers 940nm of invisible IR for covert surveillance at up to 328 feet. Unlike traditional infrared surveillance cameras that use 850nm IR LEDs, these cameras employ 940nm IR LEDs which do not emit a visible red glow. This makes them undetectable in the dark, rendering them a preferred choice for covert video surveillance systems. This camera is ideal for critical infrastructure, public areas, and airports.