Be seen, either in the day or at night, with the super-powerful Flux™ Expert taillight. The flashing mode automatically boosts the light's output to 110 Lumens during the day for up to 14 hours, while making you visible up to a two thirds-of-a-mile (or one kilometer) in full daylight.

• Maximum safety, even in the brightest conditions.
• 110 Lumens output sets new benchmark.
• Visible up to 0.6 miles/1.0 kilometers during midday in the summer.
• Patent-pending reflector mounting system for perfect aim on 27.2, 30.9mm, and Venge seatposts.
• Ambient light sensor boosts light output by 50% while in Flash Mode during daytime running, for increased visibility.
• Integrated, flip-out USB tab to charge rechargeable Li-Ion battery in any USB port in under 90 minutes.
• All the aesthetics and performance to match the fastest road race, adventure, and commuting bikes.
• Three operating modes: Steady, 25 Lumens, Surge, 5-55 Lumens, Flash, 55-110 Lumens