versatile helmet-mounted light that can be used in all types of ground operations. Provide flash or constant light. Powered by a standard CR123A 3V lithium disposable battery (battery is NOT included). Photocell for long life and extreme temperature operation. Waterproof and dustproof. With the slide switch, it will not be annoying even when using on or in the helmet. Positive visual and tactile confirmation of ON/OFF status and working status without guesswork. Helps prevent accidental battery drain if left on in IR mode. Model: Black Bottom D Size:8.5x5.5x3.5cm Material:Nylon + Electronic Components Color:Gray Black Package Contents: 10 * Helmet Light Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.