* Plug-and-Stay nano receiver is so small you can plug it in and leave it in. Or store the receiver in the battery compartment * Advanced Blue Optical sensor tracks on more surfaces than standard optical * 2.4 GHz wireless for long range and minimal interference * Contoured buttons and sculpted sides mean no compromise on comfort * Built to last with a limited lifetime warranty * Built to survive the bumps and bruises of on-the-go use * Up to 6 month battery life * PC and Mac compatible