HP QY449AT#ABU Black USB RF Wireless Standard Keyboard and Mouse Set Mouse Included: Yes Mouse Interface: RF Wireless Tracking Method: Laser Mouse Color: Black Power Supply: 4 AA Batteries Dimensions: Keyboard: 1.09 x 18.11 x 6.46 Mouse: 1.46 x 2.48 x 4.53 Mouse DPI: 1000 dpi resolution