INFRARED LED: This LED is not a regular red colored LED. Infrared is non visible to the human eye and MUST BE USED WITH NIGHT VISION DEVICES! Please Note: For use with the W404iC, A55iC, W403iC, A48iC, and ScanPro iC Models ONLY! Includes ONE INFRARED (IR) 850nm Full Intensity Control interchangeable LED (Light sold separate). The Intensity Control LED features Full Intensity Control STANDARD. For use with the W403iC & A48iC Intensity Control Tail Cap ONLY and in the ScanPro IC Headlamp only. Not for use in the standard "ScanPro" or "ScanPro iC 3-Color-In-1". The LED assembly features a 3-year warranty, and can be changed in the field in less than 30 seconds for those wishing to use or experiment with a different led color. INFRARED 850nm - MUST be used with Night Vision. Optimized for use with digital through Gen 3+ night vision. 850nm will appear slightly brighter in digital night vision than 940nm. However, 850nm will also have a slight red "glow" when turned on. Manufacturer specifications are subject to change.