Features: Double function bike mirror bells combines a 110° wide angles rearviews mirror with loud coppers bells. Features 360 degrees regulable aluminum stem and flexible silicones neck for perfect positioning, with scratch resistant acrylic mirror maintaining clear in various weather condition. Ideal for commuters, and delivery cyclists using bicycles, e bikes, or shared bikes who prioritize road safety during daily travels. Enhances visibilities during busy traffics navigations, bike lane merges, and crowded pathways while providing instants hearable warnings through quick thumb bells activation. Weighing only 89g with simple installation, this durability ABS+aluminum accessory withstands vibrations without adding bulk to handlebars. Specifications: Color:Two Elections Dimension:65×45mm/2.56×1.77in Component:Resins Package Includes: 1pc Bicycles bells rearviews mirror note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.