Specifications: Type: Bicycle Rear Light Group: Adult Features: 1. High quality material Safety flashing light is made of sturdy and durable, environmentally friendly materials to ensure a long lamp life. It can be used in various weather conditions to fully meet your outdoor driving needs. 2. Ultra Bright Light Source Safety Flashing Light uses a stable and bright light source. At the same time, it has 4 light modes. It can remind other pedestrians and motor vehicles to issue safety warnings at night. Allows you to keep a safe distance. 3. Weather resistance The LED safety flash light is of good quality and a reliable companion in bad weather and has excellent water and rain resistance. The waterproof performance can withstand most rainy and snowy days, and you can ride however you want. It is very suitable for use in various weather conditions to ensure your driving safety. 4. Versatility LED safety flashing light is very easy to install. It can be mounted on a bike in a few seconds without tools. It is suitable for all types of bicycles, racing bikes, mountain bikes and hybrid vehicles. At the same time, LED safety flashing light can also be installed in running clothes, strollers, bags, backpacks, helmets, clothing, dog collars, bed linen and is very suitable for runners, children, hikers, climbers, dogs, etc. Package Included: 1 Pc or 2 Pcs x Bicycle Rear Light (Built-in lithium battery) Note: 1. Please allow 1-3 cm measuring deviation due to manual measurement. ( 1 inch = 2.54 cm ) 2. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!