Lezyne AI Alert

The light uses an integrated accelerometer to detect when you slow down. When it senses deceleration, it automatically increases the brightness to act as a brake light, signaling your movement to drivers behind you.

The light is specifically designed for saddle mounting. While it fits most standard saddle rails, it may not be compatible with certain proprietary or integrated saddle systems, so check your seat post setup before purchasing.

Battery life varies significantly depending on which of the five output modes you select. Because it is a high-output 250-lumen light, using the brightest setting will drain the battery faster than the lower-intensity or flashing modes.

Yes, the light is built with a durable construction designed to withstand the rigors of daily cycling, including exposure to the elements. It is weather-resistant, though it should not be submerged in water.

No, the unit is fully USB rechargeable. You can charge it using a standard USB cable, which eliminates the need for disposable batteries and makes it easy to top off the charge from a computer or wall adapter.