These are pretty awesome little Wheel Lights that attach to any tyre value. They have an internal sensor that turns them on only when the wheels are rotating. They screw onto any tyre value (probably replacing that cap you lost anyway) so these little Wheel Light should fit on your bike, car, pram, motorbike and wheel barrow. 

Product Features: 

1. Movement sensor, only light up when wheels are spinning 

2. Automatically turn off after the wheels stoped 

3. Installs on standard tyre air stem valve of cars, motorcycles or bicycles  ndard tyre air stem valve of cars, motorcycles or bicycles 

4. Steel body, against rust and water so it has longer life 5. Increases nighttime and bad weather visibility for enhanced safety. 

6. When you stop they will switch off to save battery power 

7. Durable, High Impact, and Rust Resistant 

8. 100% Waterproof 

Product Description 

 Quantity(Pcs/Ctn):500

 Ctn Size:42.5*33.5*58

 Weight(G):20

 G.W.(KG):11

 N.W.(KG):10.5

 Package:Blister Card(2 pieces)