LED Bike Light Set,Optimal illumination of the bike route with a very bright headlight with switchable light output (100/70/30/15 lux),Headlamp with integrated lithium-ion battery (1800 mAh), with OSRAM LED bulb,Automatic light control � the front light automatically adjusts to the ambient light,Rear light with brake display function, 3 powerful LEDs (4 cd) with integrated lithium-ion battery (300 mAh),Emergency brake light function � lights up several times during heavy braking, lights up brighter during normal braking,With integrated Li-Ion battery,IP44 Waterproof,Light output: max. 100 lux,Front light operation time: up to 8.5 h,Rear light lighting time: up to 5-6 h,Lifespan of each LED bulb: approx. 50,000 hours,Sizes: Front light: approx. 11 x 4.1 x 4.5 cm / Rear light: approx. 4.8 x 2.5 x 1.95 cm