The IR Variable Power Switch replaces the battery cap on the external IR Illuminator to allow adjustment between 3 switch settings (100% output | Power off | 50% Output). The settings are clearly marked with red and white dots painted on the unit. The dots line up to indicate whether the illuminator is powered on because IR light- depending on the wavelength- can be difficult, if not impossible to see with the unaided eye.
All Gen 3 and Gen 2+ night vision image intensifier tubes and devices as well as thermal sensors and devices are subject to United States export rules and regulations. Valid export licenses may be issued by the U.S. Department of State, Directorate of Defense Trade Controls, in accordance with the International Traffic in Arms Regulation (ITAR), Title 22, Code of Federal Regulation 120-130; or by the U.S. Department of Commerce in accordance with the Export Administration Regulations (EAR), 15 CFR Parts 730-774.