Features Night Evolution Charge Mpls - Helmet Lights-Illumination Tool can attach to a MICH Helmet or any vest molle system. It has a 2 inch flexible neck that allows for easy and precise task lighting just in case its too dark to see what youre reading. You can easily change the battery without using any tools at all. The battery used for this is 1 AA alkaline battery or a NiMh rechargeable battery. The Charge Mpls has 4 output modes: Red, green white LEDs and a IR LED. Weight: 118g Color: Black,Tan Helmet light function use operation: 1. long press the switch 1 minute green LED, continuous fast press the switch red LED, in red or green light mode long press the switch 2 seconds or longer white LED, then short press to turn off 2. In the shutdown state, long press the switch for 2 seconds or more to IRD, Cick agan off 3. off continue to press (interval half a second), red and green LED can be cyclic switching