Soondar Bike Bicycle Colorful Rainbow LED Wheel Signal Light Lamp 16 LED 32 Pattern Easy installation, it can be fixed on cycle spoke. Consists of 32pcs colorful LEDs. Flash 30 kinds of flower patterns which will be changed every few seconds. Pattern is clear and completely when speed up to 20 km / hour. Equipped with light sensor and movement sensor, flash only at night and moving, it will not work and save power when not running. Operated by 3 AAA batteries(not included), can work about 48 hours.