Includes a built-in 380mah battery.With a charging time of 1.5 hours, the disco ball can be used for 4 hours. It is perfect for bedrooms/festivals or at parties with difficult or no power supply. Size: 55*53*53mm, weight: 38g.High brightness with small size, the light can be placed directly on a table or chair or mounted on a wall or ceiling Nearby sounds or music can be identified by a powerful sound sensor.The color and tempo of the color change can be changed according to the beat of the music.(Red, Blue and Green, or all colors together) Easy to charge the battery almost anywhere with a USB power supply, a power bank, a laptop/notebook, or in the vehicle, anywhere and at any time The disco ball is ideal for any type of party (birthday, family celebration, disco, wedding, Halloween, pajamas, karaoke) or just for the children's room