The Lifetime Trackball keyboard is a 104-key Windows Compatible keyboard featuring a built-in trackball. Its the perfect solution for users looking to make the move to a trackball and reduce desktop clutter. The TRACKBALL-U2 products meet the European Union RoHS initiatives. Like all Lifetime products, the Trackball keyboard is an example of innovative design and engineering. The trackball is ergonomically located below the spacebar for convenient operation - you can move your cursor without lifting your hands from the keyboard. Maintenance is a snap, since the retaining ring is easily removed for cleaning.