A bike brake warning system completes the Turn, making it one of the most complete safety products on the market.  When you activate your brake lever fitted with an OxiBrake (a silicone device included in the pack that slips over your brake lever) to decelerate, an intense red light comes on immediately to warn any road users following you. This gives them time to adapt their speed and/or trajectory.  The 100% reliable brake warning function sets it apart from similar products based on accelerometers whose reliability is all too easily compromised (defects in the road surface, reduced speed, etc.).