USB Powered Switch Controlled Sound Reactive 6 Inch Inert Gas Plasma Ball with RGB LED Colour Changing Base Can be Set to Sound Responsive Mode where Streamers Activate and the Base Changes Colour when a Sound is Made Easily Choose Between Six Static Shades of Red, Blue and Green Colours or Select the Gentle Colour Phasing Great Gift for People Interested in Science, into All Things Retro, a Different Kind of Party Light or as a Mood Light Measures Around 25 cm by 14.5 cm by 14.5 cm | Powered Via Included USB Cable | Requires 5V | 1A USB Supply This product is exempt from UK energy efficiency labelling as it produces a luminous flux below 60 lumens