Bell Dark Flyer Bicycle Light Set Includes headlight and tail light and offer the brightest most visible light set with the longest run time The headlight features "Take Me Home" battery saving technology with the brightest halogen with twin action LEDs The large side portals provide 180-Degree of visibility and tail light is the most visible bicycle-specific tail light No tools install with exclusive cabinet and clamp Requires 4 AA and 2 AAA batteries (not included) Eight large super red LEDs with six x flashing modes