HP 685 Comfort Dual-Mode Wireless Keyboard and Mouse Combo (8T6L7UT) - Keyboard Type: Full size 3-Zone Layout, Keys Structure: Plunger, 2.0mm, Low Profile Key Travel, Mouse Buttons: 7, Programmable Buttons: 7, Resolution: Up to 4000 dpi, Battery life: Up to 20 Months (mouse), Up to 36 months (Keyboard), Wireless Range: Up to 10m