Hello Kitty KT4092 Wireless Optical Mouse RF Wireless Technolgy MAC/PC/OS Compatible with windows Plug-and-Play Connectivity/RF-WIRELESS TECHNOLGY for freedom of operation High Resolution 800cpi Latest RF (27Mhz) Wireless Technology Standby Mode for Power Saving Rubberized Scroll Wheel Compatible with windows 98/2000/Me/XP-AND MAC