14 LED 40 Design Patterns Bike Bicycle Wheel Spoke Light Specification: Material: ABS plastic Size:13.5 x 5.2 x 2.4CM LED Number: 14 Description: Waterproof ,shuts off automatically. Can installed on the front or back wheel. 14 blue LED light, 40 design patterns and five word patterns, patterns change every three seconds. Display sequence: Message, Patterns, Time of Riding, Number of Rounds, Patterns Car lights increase night-time and bad weather visibility for safety. Requires 3 x AAA batteries (Battery Not Included). The LED lights will keep blinking for two minutes after wheel has stopped. Package Included: 1 x Wheel Light (battery not included) Kindly Reminder: This product is long,so that it fits on bike with a wheel diameter of 20" or greater.