In addition to this User Guide, this package contains:
•Wireless optical mouse
•USB RF receiver
•2 AAA batteries
•Carrying pouch
System requirements
Hardware
•PC with a Pentium processor (or equivalent)
•USB port
Operating system
• Microsoft® Windows® 98SE/Me/2000/XP and Mac
Using the mouse
Installing the batteries
To install the batteries:
1Press the battery cover release button, then slide the battery cover off the mouse.
Battery cover 
release button