SHANREN SR-BL30 Super Bright 8-watt 1044LM LED Bike Light (Cree MK-R+Mobile Power Bank 10400mAh) CREE MK-R ,high-efficiency natural - white LED, perfectly focused 1044-lumen beam For night riding optical design, creates smooth, optimized beam with generous peripheral light. Light transmission rate up to 97% Easy installation bracket, install firm, adjustable direction Intelligent control system, with Low battery indicator, more durable and reliable Includes high-energy 10400mAh power bank ,besides supply to bicycle light,you can also charge your mobile phone