* Intelligent rear light* Integrated acceleration sensor for Kinetic mode: intensity increases when slowing down or braking* Allows you to use Kinetic mode on other SYNC rear lights* Can be controlled with the SYNC Core or with the smartphone app* 5 LED design with 30 lumen main LED for visibility from a great distance* 6 modes providing excellent visibility, day or night* Superior side visibility* Battery life: up to 50 hours