Starbrightz mini LED bicycle spoke lights add easy, quick fun to your bike! These fun little lights create a ring of color morphing light as you ride. Just clip them on to any standard, round spoke and you're ready to roll! Just twist the lights to turn them on or off. Two CR927 batteries are included and can easily by replaced. Lights will last up to 24 hours on one set of batteries. FEATURES: Includes: 2 mini LED spoke lights with batteries Simple twist on & off Easy clip-on installation - tool free Fit most standard size spokes Battery included - 2 CR927 (3V) - Easily Replaceable Lasts up to 24 hours Weather resistant