AOR POWER AOR169 Bicycle Tire Valve Stem LED Cap Lights, 2 Pack - White An eye-catching and fun way to make your cycle or bike even more visible to motorists Powered by three AG10 batteries per light (included and pre-installed) Made of corrosion resistant and lightweight plastic for safety reasons - will break if We are a U.S. seller - buy with confidence knowing your product will arrive safely Water resistant stem light is easy to install or remove for daytime riding