One of the best bike taillights ever. It's bright w/ multiple settings, rechargeable, and easy to take on and off. I love it and can't believe they have it priced so low. It's so nice that I need to take it off and keep it in doors when not in use for fear that someone will steal it. This is the only tail light you should ever need! Buying a back up soon! This light joined my exclusive LNF list. LNF = Look no Further, this is the one you want, forget about the rest.