The Verbatim 8-Button Deluxe Mice features Blue LED technology, allowing users to navigate on virtually any surface, from a glass tabletop to granite counter top and with 2.4GHz wireless performance you can enjoy lag-free cursor movement. The mouse connects to the computer via a nano receiver, small enough to plug in and leave connected – great for computing on the go. When not in use, the receiver stores conveniently inside the battery compartment (which comes supplied with two AA batteries).It has a smooth Ergonomic design and Contoured shape with an easy-grip surface to ensure that the user remains comfortable after hours of computing.