For an easy-to-use mouse that feels just right in your left or right hand, try the M310 wireless mouse. It offers a comfortable, contoured design with soft rubber side grips, 18 months of battery life, and our tiny, leave-in USB nano receiver that provides long-range, advanced 2.4 GHz wireless connectivity for fast data transmission and virtually no delays or dropouts. Connector/Port/Interface: USB 2.0; Left/Right Hand Use: Left/Right; Mouse Technology: Laser; Wired/Wireless: Wireless.