The Gaciron Smart Brake Bike Tail Light is one of the best bicycle tail light available. Fitted with automatic brake detection, this light illuminates when you slow down to alert other cyclists and drivers to your actions. Being USB rechargeable as well as water resistant, it comes in handy and is safe to use in all weather. It ensures great rear visibility due to bright LED lights and so increases safety in the night ride or at dusk. Easy installation gives a smart and safe cycling experience.