If you want to warn others that you’re stopping…this will do it..

https://www.youtube.com/watch?v=ELChOPQCaTs (skip to 5 min)

Brake tail light with emergency brake light functioncSensor technology:

No connection to the brake necessary Stoplight technology for braking and abrupt brakingSuitable for 6 - 50 V DC supply

Not approved for use with fast E-Bikes

Incorporates LineTec technologycIntegrated Z reflector5c0 mm fittingRack mounting

For use only with E-Bikes only

Minimalist design and fully functional. Brex can be easily exchanged for the existing rear light, without the need for wiring to the brake lever. The stoplight has two functions: When slowing down the LineTec light beam lights up brightly and distinctly. The emergency stoplight will pulsate and is ultra bright should abrupt braking occur. The Brex is connected directly to the E-Bike battery or E-Bike headlight.