Benran Super Bright LED Bicycle Bike Tail Light - Personalized LED Colorful Rear Lights - Perfect for Safety and Fun - Easy to Install - Red Colorful &ndash; Fits on Any Bike - Light Holder Included Super-bright LED rear light for safety and style on night rides. No tools required, fast and easy installation. Powered by: 2 AAA batteries (batteries included). The design makes it water resistant for rainy rides. Best bike light set for BIKING / CAMPING / HIKING / RUNNING with Included Helmet Accessories.