Built-in 3 button batteries, with an "on/off" switch. When using, open the switch that in the middle of in the heart can shine. Broad-brimmed head hoop, with a small non-slip tooth, convenient to wear. Suitable for party, holiday party, theatrical performances and other activities, applicable to both adults and children. Also can be used as a children toy. As the best tire, can add atmosphere for all kinds of ball activities.