Sensor technology: Smooth Optical tracking
Number of buttons: 3 (Left/Right-click, Middle click)
Scrolling: line-by-line
Scroll Wheel: Yes, 2D, optical
Connect/Power: On/Off power button
1 AA battery（Alkaline Battery)
Battery life: 12 months 9Keyboard battery life calculation
based on an estimated two million keystrokes/year in an office
environment. User experience may vary. Mouse battery life may vary based on user and computing conditions.
Spill-resistant design 7Tested under limited conditions (maximum of 60 ml liquid spillage). Do not immerse the keyboard in liquid.
Adjustable keyboard height
10-Key Number pad
Key type: deep profile
Caps lock indicator light
On/Off power switch
2 AAA batteries（Alkaline Battery）
Battery life: 36 months 8Keyboard battery life calculation based on an estimated two million keystrokes/year in an office environment. User experience may vary. Mouse battery life may vary based on user and computing conditions.
Keyboard with 2 AAA batteries
Mouse with 1 AA battery
USB receiver
User documentation
