LED Bike/Car/Motor Wheel Flash Light Use 1.Please kindly note there is a piece of paper in the battery case that needs to be removed before use. Sometimes it still not work when you remove the paper, then you need to put them on the valve stem and ride, they will light up. 2.If you don't need to use it, place the paper in the middle of the battery compartment screws to stop the glow Works For Suitable for American valve and English valve cars, French valve unavailable Batteries Requires 3 x AG10 button batteries per light (included) Universal Fits for most road/ mountain bicycles, motorcycles and cars. Installation Instruction & Note *please make sure the positive and negative poles when installing, the end with no word facing the spring. Note 1: Be sure to put the battery in the black insulating case inside, do not expose it, otherwise the battery and the metal of the lamp will cause the short circuit ,the battery will be dead in a few minutes. Note 2: Be careful when screwing the lamp head. Make sure that the metal strip on the side of the lamp head is in good contact with the metal base (if the metal is too close to the inside, you can manually pull it out, but must be gentle) Note 3:If the lamp does not light under normal conditions, you can adjust the length of the spring to ensure full contact with the battery (not too hard, it is easy to cause the spring to fall off), if it still do not light up please change the battery to try. LED Colorful Valve Caps Light Fastures Function The LED flash tire light has the function of indicates a warning light and decoration night driving, can enhance visibility at night and in bad weather to ensure safety Flash Light Auto shining and no switch,more energy efficient,lights turns on when moving and off when stopped Easy to install No tools are needed,easily attach it to your bicycle, motorcycle or car's wheel 12PCS LED Bike/Motorcycle/Car Wheel Lights 24PCS LED Bike/Motorcycle/Car Wheel Lights FICBOX 4 Pack LED Valve Stem Caps Lights for Car Tires Bike 4 Pack LED Boat Light,LED Navigation Lights Kit for Boat Kayak 12PCS LED Bike/Motorcycle/Car Wheel Lights 32PCS LED Bike/Motorcycle/Car Wheel Lights Add to Cart Buying Options Add to Cart Add to Cart Buying Options Buying Options Customer Reviews 3.1 out of 5 stars 3,377 3.1 out of 5 stars 3,377 3.3 out of 5 stars 21 4.2 out of 5 stars 18 — — Price $9.99$9.99 — no data $9.99$9.99 $15.99$15.99 — no data — no data Kit Include 12PCS 24PCS 4PCS 4Pack 12PCS 32PCS Light Color Blue Red, Green, Multicolor,Blue Colorful White,Green,Red Blue Mixed,Green,Red,Blue,Yellow Easy to Use ✓ ✓ ✓ ✓ ✓ ✓ Popular Presents ✓ ✓ ✓ ✓ ✓ ✓ # of Color Options 5 4 1 2 3 5