Logitech Wireless Keyboard Mouse MK330

Spill-resistant design 7Tested under limited conditions (maximum of 60 ml liquid spillage). Do not immerse the keyboard in liquid. 10-Key Number pad Key type: Deep profile On/Off power switch 2 AAA batteries(Alkaline Battery) Battery: 24 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. 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) 1 year warranty and delivery done countrywide