Easy to install - Attaches to the handlebar and tightens with a screwdriver (screwdriver not included). Simple to install and secure. Reflector for rear safety - A red rear reflector is mounted at the back of the mirror to alert oncoming vehicles and improve riding safety. Adjustable viewing angle - The end of the bicycle handlebar mirror features a flexible lever that lets you quickly adjust the mirror position for a clear rear view. Compatibility and size - Universal reflective safety glass mirror fits most handlebars with a diameter of 2-2.2 cm. - Suitable for both mountain bikes and road bikes. Material - Mirror surface made of safety glass for clear reflection and reliable visibility. Performance and practicality - Provides a clear rear view to monitor traffic, enabling safer lane changes and situational awareness during rides. Use scenarios - Urban commuting: Keep an eye on traffic behind you when merging or changing lanes in city streets. - Night or low-light rides: Red reflector increases conspicuity to other road users in dim conditions. - Road and mountain cycling: Quickly adjust the mirror angle on varied terrains to maintain a comfortable rear view while riding. Note - Screwdriver is not included.