I purchased this headlight for my boyfriend who rides a bicycle everywhere he goes and he gets about 30 miles in a day and night. Which is where this little headlight fits in. It has a hand sensor for motion detection, charges by USB, and lasts 2 and half hours on high.The law states you are to equip your bicycle with a visible headlight and taillight or suffer the consequenes. My boyfriend has been pulled over a lot for this reason. It's a safety precaution for yourself and other drivers on the road, which is a smart one. He hasn't been pulled over since getting ths headlight, so thank you #THREETREES for a life saving item. #RankBoosterReviewer #Sponsored