Improved mini bicycle mirror with flip-top lid - Flip-top design closes to protect the mirror lens from bumps when not in use. The improved mini shape is compact and easy to carry, taking up very little space. Acrylic lens rear view mirror - High-resolution acrylic lens provides a clear, wide rear view with wobble-free performance, enhancing riding safety. - High hardness PC bracket increases shock resistance for longer service life. 360° rotating universal - Universal ball joint allows a full 360° rotation to dial in the exact angle you need. Suitable for both sides - Universal design fits open handlebars and can be mounted on either the left or right side. - Fits handlebar inner diameter 16-22 mm. Please confirm your handlebar diameter before purchasing. - Note: not suitable for handlebar inner diameters under 16 mm. Use scenarios - City commuting: keep a clear view of traffic behind you, while the flip-top lid protects the lens during stops. - Rough road or light trail riding: durable construction and stable view help you react to nearby hazards. - Flexible mounting and sharing: install on left or right side on bikes with 16-22 mm handlebars, and easily switch sides for different riders or bikes.