Battery: Includes a built-in 380 mAh battery. With a charging time of 1.5 hours, according to the settings of different modes the disco ball can be used for 2-4 hours. It is perfect for bedroom/festivals or at parties with difficult or no power supply. Very suitable as a birthday gift for children. Mini and portable: Size: 55 x 53 x 53 mm. Small size so can be placed directly on a table or chair or mounted on a wall or ceiling. Sound or music nearby can be identified by a powerful sound sensor. The colour and the speed of the colour change can be set to follow of the music. (red, blue and green, or all colours together) USB charging: easy to charge the battery almost anywhere with a USB power supply, a power bank, a laptop/notebook or can be used anywhere and anytime in the vehicle. Suitable for many situations: The disco ball is Perfect for any kind of party (birthday, family celebrations, disco, wedding, Halloween, pyjamas, karaoke) or just for the children's room. style: B-self-propelled voice control model(The colors are superimposed and change, flashing slowly when there is no sound, and flashing with sound when there is sound) size: 5.5 x 5.3 x 5.3cm Material: PC colour: As Shown Package Contents: 1 x Mini disco ball light 1 x usb charging cable 1 x Chinese and English instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.