These LED bike lights make a circle of light on your bicycle’s wheel that stays on whether you are pedalling or stationary. They’re lined in clear tubing that’s totally waterproof, so feel free to soar through puddles. And, to power them, you’ll just need 3 x AA batteries (not included). One pack contains enough lights for one wheel, so be sure to order 2 packs if you want to light up both wheels of your bicycle. Battery powered bike wheel lights? Well, that’s a bright idea. And, you’ll be very bright if you order these Wheel Brightz now!Contains: Wheel Brightz - BlueAge: 6 Years+Batteries: 3x AA Batteries required (Not Included)