This handy clip-on light may be the most important accessory you pick up for your bike trailer. Stay safe while riding in low-light conditions by adding extra visibility to your trailer. With 5 LED bulbs and 4 light modes, you'll be easier to see for drivers and other cyclists, day or night. You'll Love - - 5 LED bulbs for higher visibility - 4 light modes (flashing, constant, chasing, and random) - Compatible with any Burley trailer that has a Light Loop or Light Bracket - Includes clip-on light and 2 AA batteries