DAWAY A02 Bright Bike Wheel Lights - Waterproof 14 LED Spoke Light Night Riding 30 Different Patterns Change Birthday Presents Boys Girls Adults LIGHT SENSOR & DYNAMIC SENSOR, ENERGY SAVING! DAWAY A02 bright bike wheel light is controlled by light sensor and dynamic sensor. Only when the bike moves at night or in dark area, DAWAY A02 led bike spoke lights will light intelligently. When the bike stop or at daytime or in bright area , the wheel lights will be off within 48 seconds automatically. How convenient and energy saving PATTERNS CHANGE DESIGN, SO BRIGHT & COOL! This DAWAY A02 led bike wheel lights is made of 14 pieces double-sided led lamp beads, changing a pattern every 3 seconds, 30 different patterns in total. Interesting pattern effect shown, when riding speed reaches 15mph, the patterns will become complete, perfect. If speed is below 15mph, the bicycle wheel lights will show half or part of the pattern WATERPROOF! The waterproof level of this DAWAY A02 bright bike wheel light is IP55 , installing this led bicycle spoke lights, you also don't need to worry about riding in rainy day. Note: If wheel light is also on during daylight or bright area, pls check if sensor part is blocked by hand or other object. Because if the sensor part is blocked light, it will be in dark state, at this time, move wheel light, it will light automatically, too SAFETY AND EASY TO USE! DAWAY A02 led bike wheel light is very lightweight. Dont need any other tool, only need several seconds, this bike tire lights can be installed safely. Perfect Birthday Gifts & Festival Presents for Your Boys, Girls, Husband, Your Friends or Yourself FITS MOST BIKES, MONEY BACK GUARANTEE! DAWAY A02 bike wheel lights can be installed by most of bicycles with spokes, wheel diameter is above 16 inches, such as rode bike, mountain bike, fixed gear bike and ordinary bicycles. But not suitable for wide spokes bikes. If have any quality problems or don't like this bicycle tire light, pls contact with us, 100% refund or replacement