【Smart design concept】: This cute ‘Happy Birthday’ Cake decorates card inserts, uses the latest design, with interesting rich illustrations, adds fireworks, lighting effects, and celebrates birthday parties with the song "Happy Birthday". 【How to play the "Happy Birthday" song】: When you place it on the cake, there is a button on the right side of the decorative insert (press here) that needs to be pressed. Happy birthday song will ring, and when the song is finished you can imagine blowing candles, blowing here (fire heart) you can get fireworks show, bright lights and surprises so that the person who receives this cake is very happy. 【Firework LED flash】: The lights of fireworks come in several colors, and they flash regularly according to the speed of the sound, giving the person who receives the cake an unforgettable experience, double the surprise and happiness. 【Wide Usage】Happy Birthday Cake Topper is perfect for Happy Birthday themed parties, celebrating the anniversary of the themed party cake decoration, it can make your cake more attractive and bring fun to your party. You can also apply them to ice cream, fruits, cookies, and other desserts. 【Professional After-sales Service】: 24 hours special reply, if you encounter any problems with our products, you can contact us in time, our products may cause damage, (music lighting, blowing cannot work properly) may also contact us to apply for a replacement or refund. LED Musical Birthday Cake Toppers