HP 655 Wireless Keyboard and Mouse Combo (4R009UT) - Keyboard Type: Full size 3-Zone Layout, Keys Structure: Plunger, 2.0mm, Low Profile Key Travel, Mouse Buttons: 3, Programmable Buttons: 2, Resolution: Up to 4000 dpi, Battery life: Up to 24 Months (mouse), Up to 20 months (Keyboard)