Featuresr 32 leds with 4 colors double sidedr light with 32 different gorgeous patterns shining by turns and changing every 4 secondsr pattern is clear and complete when speed is up to 20kmhr equipped with light sensor and movement sensor flash only in the dark and actionr manual power on power off by pressing the button for 2 secondsr powered by three aaa batteries not includedr easy installationr r note 1 the bike wheel spoke light can be used in rain but can not be soaked in t