Compact dimensions: 19 cm x 6.5 cm x 4.5 cm (7.48 in x 2.56 in x 1.77 in). This handlebar mounted convex mirror with bell is designed to be unobtrusive yet effective, providing a clear rear view without taking up space on your handlebars. Adjustable viewing angles: The flexible support rod allows 360degree rotation and multiangle adjustments, so you can set the viewing position that suits your riding style and conditions. Wide compatibility: Fits handlebars with diameters from 22 mm to 32 mm. Suitable for bicycles, electric bikes, and shared bikes. Durable material: Made from metal, this rearview mirror is built to withstand daily use while maintaining its functionality and appearance over time. Use scenarios: Urban commuting and busy streets where quick rear visibility helps with safe lane changes and merging. Electric bike rides that require reliable rear awareness at varying speeds. Shared or rental bikes where a universal fit and dependable rear visibility improve rider safety.