This fairy string lights shine a fascinating & colorful light, and are specially designed to decorate any space you want and beautify your every night. The LED String Fairy Lights is no need battery, energy saving and environmental performance The copper wired string light, easily twisted, with sync to music will change the speed with the music rhythm With timer function, you could set any time as you like to save much more electricity With the App, Download APP "LedBle" (IOS /Android), connect the light via Bluetooth-compatible you can easily change the color and the mode of lights, NO NEED a remote controller. The starry light is dimmable within a 12m range with the app The led string lights could drag the brightness adjustment button on the APP to achieve any degree of dimming or glowing, instead of choosing from several brightness levels The fairy string lights is with memory function, will keep working and flashing mode even if the Bluetooth-compatible is out of connect, as well as keeping last of the timer setting, no need to worry about wasting electricity This fairy string light is waterproof, suit for indoor and outdoor decoration, creating festive, soft or romantic atmosphere Specification: Size: 2 meters with 20 lights 5 meters with 50 lights 10 meters with 100 lights 20 meters with 200 lights Package included: 1 x RGB LED String Light Other items not included