RECHARGEABLE FRONT AND REAR LED LIGHT DESIGN There are four lighting modes, which can be easily switched with a single press. Press the switch once, and the front and rear lights are always on. Press the switch twice, and the headlight is always on, and the rear light is flashing slowly. Press the switch three times, the headlight is always on, and the rear light flashes quickly. Press the switch four times, the headlight is off, and the rear light flashes slowly. Press the switch five times, Turn off all lights. [Safe And Sturdy] Gudook Integrated molding bike helmet meets the CPSC(American National Standard) and CE(European Standard) certifications, made of thickened High-density EPS buffer layer inner shell and PC outer shell, lightweight and durable, shock absorption, high impact resistance, provides higher safety performance. [Front And Rear Lights Designed] Gudook bicycle helmet comes with USB charging high brightness LED front and rear lights, a headlight that can light up ahead, and a taillight that lets others recognize your direction, which has 4 light modes and can be switched freely, provide max visibility and safety while night cycling. [Skate & Bike Helmet] bike helmets for men/women, designed for European and American men and women's riders, Ideal for urban commuting city road mountain biking, enduro and off-road, roller skating, scooter, skateboarding, etc.