A. Multifunctional safety light: A bicycle taillight that is relatively easy to install and durable. It can be installed on various types of bicycles, such as children's bicycles and adult bicycles. It can also be installed on handlebars, seat posts, dog collars, or other positions. It can also serve as a helmet light, backpack light, warning light, etc. B. This bicycle taillight has a built - in USB charging interface. C. Name: Cubelite II Smart Taillight D. Color: Red + Black E. Material: Aluminum alloy + ABS F. Package contents: - 1 bicycle taillight G. Only the above package contents are included, and other products are generally not included. H. Note: Light reflection and different displays may cause the color of the items in the pictures to vary somewhat from the actual products. The allowable measurement error is approximately +/- 1 - 3 cm.