Features: It is designed with 5 ultra-bright red LED indicator lights and 2 laser beams, making it easy to identify at night. LED indicator lights and laser beams can work simultaneously. The "Snowflake" sign can be projected onto the back of a bicycle to remind the vehicles behind to keep a safe distance. Equipped with adjustable fixtures, it is easy to install and disassemble. Specification: Durable and exquisitely crafted. USB fast charging, featuring a convenient USB charging design, ensures fast, stable and easy charging. Switch: 2 buttons (on, off and mode selection). Light color: Red. Shell color: black and red. Dimensions: approximately 8.6 x 3.1 x 4.9 cm. Bicycle stands are suitable for pipes with diameters of approximately 20 to 36 millimeters. Packaging list: 1 laser bicycle taillight, 1 bicycle stand.