Cygolite GoPro-Style Adapter Mount Description: Clean up your cockpit and center your headlight with this GoPro-style adapter for Cygolite Headlights. Features: Mount your Cygolite bicycle headlight to a variety of GoPro-compatible interfaces and third-party mounting options that are compatible with the GoPro interface Compatible with Cygolite Expilion, Metro, and Streak series bicycle headlights Includes adapter only. Base mount and thumbscrew are not included