TG LED Bike Spoke Message Light, 14 LED, Set of 2: * Fits on bikes with a wheel diameter of 20" or greater * Waterproof * Orange ABS plastic construction * 14 blue LED lights * On button * Installs on the either side of front or back wheel change letter orientation by holding the on button for 5 seconds until you see all the LEDs turn blue * Display sequence: message, patterns, time of riding, number of rounds, patterns * Patterns change every 3 seconds * 40 design patterns * 5 words patterns: "HELLO", "I LOVE YOU", "PEACE", "GOGO" and "BIKE" * Light enters sleep mode 1 minute after wheel stops * LED lights keep blinking for 2 minutes after * Shuts off automatically to save power approximately 3 minutes after wheel has stopped * Requires 3 AAA batteries (not included) * Sensor unit mounts on bike forks * Light dimensions: 1" x 2" x 5.25" * Sensor dimensions: 1" x 1" x 2"