(Light is might. Might can be light) With a weight of mere 1.5 oz, these bike lights offer up to 36 hours of usage time (See user manual for battery life under different modes), on par with the stamina of traditional heavyweight lights yet without theirclumsiness. The type-c port charging design also makes the power supply for these lights almost ubiquitous so that you dont have to make a fuss to be lit up. -on Design for Installation) Snap the lights into their groove like you are buttoning your shirt and rotate the lights to the angle you wish to rock before attaching them to the desired places of your bike (the handles, the rear of the seats). Allin one smooth move. Foolproof and tool-free. (Brace for the Night with the Right Light) The front light can fire out white beams up to 350 lumens and the back light can easily create warning flash with red beams of up to 50 lumens and its various modes. These lights are your ultimate weapon in yourfight with the night. Pierce through the darkness with the adequate brightness just by a press of a button. (Weather Through the Dark Regardless of the Weather) With waterproof capability up to IP65 certification, these lights stand tall against all the contrary weather conditions during a night bike stroll. Premium Poly-carbonate plastic also gives these lightsthe edge against brute force from falling and crashing.