Usage Tips:1. Material: Made of high-strength materials, durable, large rubber buttons are easy to operate. 2. Configuration base: multiple installation bases are configured to adapt to different platforms 3. Application: Adapt to for OpsCore ARC specification guide rail 4. Energy saving: Energy saving and power saving, using two CR123A batteries for power supply (the product does not include batteries) Applicable scene:outdoor equipment, film movie props Battery life:more than 100 minutes (different usage, different battery life) Product tip:Users need to purchase 2 x CR123A battery to use it normally(the product does not include batteries) Colour:Mud Color Material:nylon Size:12x5x2cm or 4.7x1.97x0.87in Package Contents: 1 x 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 the picture a little different from the real thing. The measurement allowed error is 1-3cm.