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, & our tiny, leave-in USB nano receiver that provides long-range, advanced 2.4 GHz wireless connectivity for fast data transmission & virtually no delays or dropouts. Connector / Port / Interface: USB 2.0; Left / Right Hand Use: Left / Right; Mouse Technology: Laser; Wired / Wireless: Wireless.