Using these LED color-changing balls is super easy. First, open the battery compartment at the bottom and insert 3 x AAA batteries (not included). Then, turn the on/off switch to the 'on' position. The balls will start changing colors every 3 - 4 seconds. You can place them on any flat surface like a tabletop as a centerpiece for your parties or special events. When you're done using them, just turn the switch to the 'off' position. As for maintenance, keep the balls away from water and sharp objects. If the light starts to dim, it's time to replace the batteries. Enjoy these beautiful color-changing LED balls at your next gathering!