Cloud Defensive REIN Single Constant Switch, Part, Black CD2219-A-BLK The new standard offering with your REIN weapon light. A single push of the button will activate your light in a constant-on manner. While on and if needed" a slight press of the button will deactivate your light for momentary-off applications. A full push of the button will turn you light back off. In critical situations" immediate and powerful lighting is essential for maximum visibility and information gathering" necessitating the need for a constant-on application. This approach has enabled the creation of a smaller" more efficient remote switch with a lower-profile design" optimizing space and allowing for better ergonomics.