Busch and Muller rear light - for the Brompton C, P and T line Line Electric folding bike - powered by the e-Motiq 

This Brompton Electric rear light (made by Busch and Muller) is specifically for the Brompton C, P and T Line e-Motiq Electric, it has a built in reflector - so will give some visibility even when the light is not on. It is only for the new (as of 2025) rear motor electric bikes and is NOT compatible with the front motor bikes