Product Description: 1.The Helmet Light is With the Latest Specific Uses for the Helmet Mounting, Widely Used in Military and Outdoor Adventure .MFG and Various Types of Ground Operations. 2.Light color: Green/Red/Blue LED + White LED. *Attention: IR Lights are Invisible and Shallow Lights, Need to use Night Vision Device to Fully Display. 3. Function: IR + Strobe/Steady LED 4. High-quality ABS Material, IP67 Waterproof Grade. Low Temperature Resistance. 5. When You Need Rescue in an Outdoor Adventure, Your Tactical Helmet Lights Can Better Assist You in Requesting Support, and it Can Also be Used for IFF. 6. installation of Battery: Open the battery cover ,insert 1pcs CR123A battery (not included). 1.Twist counterclockwise to release the fixing screw of battery cover 2.Open the battery cover ,insert 1pcs cr123a battery or 1pcs 16340 battery. 3.Put on the battery cover and tighten the fixing screws clockwise.