Features:USB powered sphere with coloured lightning flashes.When you touch the ball， the lightning bolts will combine into a strong beam and follow the movement of your finger.Create a magic and fascinating environment for your workstation.With on/off switch on the base.It is a plasma ball， good for your health.Perfect for desktop decorating and lighting.A great gift for your friends.Specifications:Base color: BlackDimensions: Bulb diameter 8 cm， base diameter 10cm， height 13cmWeight: 125gPackage size: 15 * 10.5 * 10cmPackage Contents: 1 * USB plasma ball1 * USB cable