Features: Provide bright light and unique flowings water effects to enhances visibility during nighttime cycling. Not only can be used as a tail light, but it can also serve as a navigation light to indicate road aheads, increasing safety. Using bright LED beads to provide bright and uniform lighting effects, ensuring safe ridings. Support multiple flashing modes, such as constant light, fast flashing, slow flashing, etc. You can choose the appropriate modes according to your needs. Equipped with waterproof function, it can still work normally even in harsh weather conditions. Specifications: Material: ABS and LED Color: Redness/Yellow White/Orange/Blue/Pink/Green Size: As shown in the picture Battery capacity: 300mah Charging method: Tyoe-C Charging time: about 40minutes Package Includes: 1x Bicycles Rear Light note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.