Planet Bike Superflash Micro USB bike tail light 2 high output surface mounted LEDs provide steady & Superflash modes Run times: 12 hrs (steady  3 lm) and up to 24 hrs (Superflash - 3 lm) Provide 220 of visibility 230 mAh lithium polymer battery charges in 2-4 hours with micro USB cable (included) Highly visible, even in daylight USB rechargeable lithium ion battery for 36 hours of runtime from a 2-4 hour charge Steady and attention grabbing Superflash flashing mode Highly visible, even in daylight Includes Cable