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/4.7x1.97x0.87in Package Contents: 1 * 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. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 44 hours Hope you have a pleasant shopping experience!