The CatEye AMPP 400 is a compact front light designed for riders who want dependable brightness with simple, intuitive controls. This updated version improves lens clarity, runtime efficiency, and usability, making it easier to operate in real-world riding conditions—especially with gloves on. Riders choose the AMPP 400 when they want a well-balanced commuter and road light that performs reliably both day and night without unnecessary complexity. Key Features• 400-lumen front light output• Updated optical lens for clearer, more defined beam• Large, glove-friendly illuminated power button• Double-click function instantly activates maximum brightness• Hyper Constant Flash mode for high daytime visibility• Side lens design for enhanced peripheral visibility• Mode memory recalls last-used setting• Improved runtimes compared to previous generation• USB rechargeable internal battery Compatibility & Use Notes• Front headlight only• Designed for road, gravel, and commuter use• Handlebar-mounted (standard round handlebars)• Single-stage low battery warning activates at 20% remaining charge• Suitable for daytime and nighttime riding Service / Ownership ContextFlashing and daytime visibility modes significantly extend runtime compared to steady high output. Riders should recharge regularly and avoid storing the light fully discharged. Periodically clean the lens and side windows to maintain beam clarity and side visibility. Fit & Use Signals• A good fit for commuters and everyday road riders• Commonly chosen for daytime visibility and after-dark riding• Works well for riders who want simple controls and reliable output• Not ideal for aggressive night trail riding• Not the right choice for riders seeking ultra-high lumen output
