size M, 54-58cm350gABS-plasticclick-fastenerpurplefront position lights, SOS function, indicator, brake light, tail light, 360?? visibility, optimum ventilationProduct description360 ?? smart protection – perfect for all urbanists The bike helmet LIVALL EVO21 offers an amazing visibility thanks to brake warning lights, indicators, rear and front lights from every point of view. With the SOS-technology, LIVALL makes smart bicycle helmets little bit safer. The multifunctional talent is ideal as a companion for commuters and e-scooters, bicycle and e-bike riders. In addition to the great safety features, the helmet comes in an attractive design! All features at a glance SOS emergency call Smart light 360?? visibility Brake & rear light Indicator Fall detection Anti-Loss alarm Size adjustable Optimal ventilation 360 ?? lighting system with day / night automatic The LED strip reaching to the ears and two position lights on the front of the helmet make you easily recognizable from all sides – id