For the lighting system (3 V) you need a button cell (CR 2032), which is not included.
Alternatively, lighting with a power adapter (4.5 V) is also possible, with which you can supply / operate up to 3 consumption points (houses, illuminated items and animated items). This power adapter can be found in two colour variations in our category "electrical accessories" (item number 94564 or 94567).
In the category "electrical accessories" you will find other LED fairy lights with which you can let your imagination run wild.