Colour Black Shape Round Material crystal Finish type Polished Light source type Light Emitting Diode About this item Exquisite crystal ball appearance, transparent lampshade Supports SD cards, USB disks and other devices via a USB cable, such as MP3, MP4 player Rotating speed controlling: strobe effects are controlled by voice. It can change its flicker frequency along with the rhythm of music Material : Plastic Rating Power : 5 to 20 watts Led Lifetime : 20000 Hours Work Mode : Auto and sound activated