Using this projector lamp is easy. First, make sure you have 3x AA batteries (not included) and insert them into the lamp. Then, turn it on, and it will start projecting the beautiful night sky design with changing colors of pink, purple, and blue. You can place it anywhere you want to decorate, like at a wedding, party, or outdoor event. When not in use, keep it in a dry and cool place. If the lamp doesn't work, check the batteries to ensure they are properly inserted and have enough power. Avoid getting the lamp wet as it may damage the electronics. With proper care, this lamp will bring you lots of beautiful lighting effects for your special occasions.