Fangrui Product Details 1. Material: Made Of High-strength Materials, , 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.