Material: Made of high-strength materials, durable with large rubber buttons for easy operation. Configuration base: Multiple installation bases included to adapt to different platforms. Application: Compatible with OpsCore ARC specification guide rail. Energy saving: Powered by two CR123A batteries (batteries not included), designed for energy efficiency. Applicable scenes: Suitable for outdoor equipment and film/movie props. Battery life: Over 100 minutes (varies based on usage). Product note: Users must purchase 2 x CR123A batteries separately to operate the device (batteries not included). Color: Mud Color Material: Nylon Size: 12x5x2cm / 4.7x1.97x0.87in Package Contents: 1 x Helmet Light Only the items listed above are included; other accessories are not included. Note: Due to lighting and display differences, the actual color may vary slightly from the image. Measurement error allowance: +/- 1-3cm.