It's a helmet-mounted light, multipurpose, can be used in all types of ground operations.<br> flash or constant light.<br> Powered by a standard lithium CR123A 3V disposable battery(battery does NOT included). photo cell for and extreme temperature operation. Waterproof and dustproof.<br> With design of sliding switch, it will not be inconvenient even when operating with gloves on or in the helmet.<br> Positive visual and tactile confirmation of ON/OFF and operating status with no guesswork. Helps prevent inadvertent battery depletion if left ON in IR mode.<br> model:<br> Black bottom green light D<br> size:8.5x5.5x3.5cm<br> Material:Nylon + electronic components<br> colour:Gray Black<br> Package Contents:<br> 1 * Helmet light<br> Only the above package content, other products are not included.<br> Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store