Cygolite Streak 310 USB Light This Product is of ultra bright 3W CREE x-lamp LED puts out up to 310 lumens This Product is daylighting flash mode boosts 500+ lumens of lightning-like flashes for added day riding safety Made in United States Extra compact (90 g) , water resistant, and USB Rechargeable with internal Li-Ion battery that saves cost of replacement batteries Includes headlight, mini USB charging cable, and lock-tight handlebar mount