Optical Technology
Mouse Tracking System Microsoft-proprietary optical technology
Imaging Rate Dynamically adaptable to 9000 frames per second
X-Y Resolution 400 points per inch (15.75 points per millimeter)
Tracking Speed Up to 20 inches (508 millimeters) per second

Product Feature Performance
QWERTY Key Life: 20,000,000 actuations per key
Zoom Slider Life: 250,000 actuations in either direction
Hot Key Features: My Favorites 1, My Favorites 2, My Favorites 3, My Favorites 4, My Favorites 5, Calculator, Log Off, Sleep, Mail,
Web/Home, and Messenger
Hot Key Life: 500,000 actuations per key
Media Key Features: Mute, Volume -, and Volume +
Media Key Life: 500,000 actuations per key
Enhanced Function Key Features: Help, Undo, Redo, New, Open, Close, Reply, Forward, Send, Spell, Save, and Print
Typing Speed: 1000 characters per minute
Mouse Button Features: 5 buttons including scroll wheel button
Right & Left Button Life: 1,000,000 actuations at no more than 4 actuations per second
Wheel Button Life: 150,000 actuations at no more than 4 actuations per second
Mouse Scrolling Features: Standard vertical scroll wheel
Wheel Vertical Scrolling Life: 85,000 revolutions (away from user) at no more than 60 rotations per minute, 100,000 revolutions (toward user) at no more than 60 rotations per minute
Storage Temperature & Humidity -40 °F (-40 °C) to 140 °F (60 °C) at <5% to 65% relative humidity (non-condensing)
Operating Temperature & Humidity 32° F (0° C) to 104° F (40° C) at <5% to 80% relative humidity (non-condensing)