4 Modes of Lighting Options: constant-on red light + constant-on red light and strobe white light + constant-on IR + strobe IR. Note: IR light is invisible light, and it is required to equipment with night vision to fully display With Design of Sliding Switch: This signal light is easy to manipulate controls even with gloved hands. It is ultra light weight and has no-snag design. The hook & Loop backing and curved base attaches to any loop pile surface, suitable for most tactical helmets High-quality ABS material, IP67 waterproof grade. The battery compartment cover is designed with a double-layer waterproof ring. Suitable for outdoor use, even in rainy days A screw fixing structure is added to the battery cover to make it more fixed, ensuring that the battery will not fall out, thereby ensuring the normal use of the signal light. The words on the battery cover are high-quality nylon lettering, which will not fall off or become blurred so that affect the appearance There is a graphic logo for placing the battery inside the battery compartment to avoid confusion of the positive and negative poles of the battery. (Batteries are not included) Sweet Tips: When the product is not in use, please remove the battery to avoid power consumption The helmet light is with the latest specific uses for the helmet mounting, widely used in outdoor adventure and various types of ground operations