Material: Made of high-strength materials, durable, with large rubber buttons for easy operation. Configuration base: Includes multiple installation bases to adapt to different platforms. Application: Compatible with OpsCore ARC specification guide rail. Energy saving: Powered by two CR123A batteries for energy-efficient performance (batteries not included). Applicable scenes: Suitable for outdoor equipment and film/movie props. Battery life: Over 100 minutes (varies based on usage). Product note: Users need to purchase 2 x CR123A batteries separately (not included). Color: Mud Color. Material: Nylon. Size: 12 x 5 x 2 cm / 4.7 x 1.97 x 0.87 in. Package Contents: 1 x Helmet Light Only the above items are included; other accessories are not included. Note: Due to light reflection and screen display differences, the color in the image may slightly vary from the actual product. Measurement allows an error of +/- 1-3 cm.