Important: When the battery was placed in the holder, the light flashed briefly, then went out. Then Press "on/off" button 2 seconds, Start the light, Enter auto mode.Bike Spoke LightsMaterial: ABS, 14 pcs LED lamp beadsProduct Dimensions(inches): 3.74*2.76*0.59 inchNet Weight: 1.13 ounceBattery: 1 x AAA battery Graphics: 30 patterns changes every 4 secondsWorking Time: 8-10 hoursSwitch: Manual Switch Button and Dynamic SensorPress "on/off" button 2 seconds, enter auto mode. At this time, light glows when bike moves, turns off after stop moving for 60 seconds. Or you can press "on/off" button 2 seconds again to turn off the bike wheel lights immediately.Fun pattern effects, controlled by your riding speed. The faster you ride, the more complete and beautiful the patterns are.Bike wheel lights led waterproof designed, Comes with excellent leakproofness, capable to prevent water from penetrating inside the battery, so you dont need to worry about riding in the rainy day, So especially useful if you fancy a late night bike ride.Awesome Birthday Gifts & Popular Christmas Presents for Kids, Children, Adults, Boys, Girls and yourselfBe the CoolestColorful Ride - 30 different patterns change every 4 seconds, very cool looking.Waterproof and SafeWaterproof & All Weather Use Use the bike wheel lights in all weather conditions without a worry.No Tools RequiredEasy Installation Install in minutes, no tools required!How to install the Bike Tire Light?Step 1Install the battery, then unscrew the screws on the bike wheel light.Step 2place the wheel light on the spoke.Step 3Insert the screw from behind and secure the spokes in the groove of the screw.Step 4Finally, tighten the nut. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.