[Features] Installed Securely -- Advanced and flexible silicone mounting straps provide great safety, holding the USB-rechargeable bike light set tightly enough to prevent falling off even on bumpy roads. Loosen and fasten them easily without any tools required. Fits all kinds of bikes such as kids bikes/ road bikes. Waterproof & Light Weight-- Fully enclosed design to protect the cycling light set from rainy days, even the USB port is completely covered, making it convenient to use in all weather conditions. The light weight and sturdy shell guarantees stable performance, which is very important when you ride on complex terrain. [product information] Product name:Bicycle lamp Color:red Material:plastic Size:43*45mm Packing list (you can get after purchasing one item): Bicycle lamp*1 Please understand: 1. Due to the long shipping time, the item may be damaged during the shipping process, if the item is damaged, please leave us a message through the official website immediately before posting comments, and I will solve the problem for you. 2. Due to manual measurement, the size may have an error of 1-3cm. 3. Colors may vary from monitor to monitor.