Close range zone design and USB rechargeable - The light can cover more space in cost-effective way due to it utilize cutting edge optic lens. And front light is powered by premium Li-ion battery 1300mAh and OSRAM led. Tail light powered by Li-ion battery 200mAh and Cree led.
 
3 stage power indicator and 3 modes - Keep reminding of you power remaining so that you can plan cycling more reasonable, switch different mode according to cycling status.