There are two buttons in the solar panel of this waterfall lights, you can press the switch button to turn on or off the solar fairy lights, and you can adjust the mode from the mode button beside the switch button. Put the waterfall lights outside after turning on the switch?the fairy lights can charging during the daytime and light up at night automatically.The led fairy lights come with 8 Modes - blink,wave, sequential, slow glow,flash,slow fade,twinkle,stead.