Brand New Factor Sealed, NIP. Fits most children's bikes with 1/2"inch Axle only! . Never needs batteries. They have been tested and still work & will always work! No batteries, no maintenance: fit & forget! Award winning. Tough & durable with a full 1 year warranty Non slip surface and super grip studs. Pedalite Flashing Battery Free Pedals have been designed to make cyclists more visible to motorists day and night, from a distance of upto 1km away and from any angle, including the side. As soon as you start pedalling the Pedalite pedals uniquely harvest and store a small amount of energy so the lights continue to flash when the cyclist is freewheeling or has stopped at a road junction. 75% of Cycling accidents happen at, or near, a road junction [source RoSPA], where cycles need to be seen from the side. Pedalite pedals help cyclists create their own virtual cycle lane as motorists naturally give cyclists with Pedalite pedals a wider berth and distance, increasing their safety. When cycling it is vitally important to be seen from the side by other road users and to ensure you have lighting on a bicycle even during daylight hours for when you ride through a shadow or a cloud comes overhead. Confirm your pedal size with your bike shop before purchase.