Logitech M545 2.4GHz Wireless Mouse with USB Unifying Receiver Plug and Play Ergonomic Optiacal Mouse 1000DPI with Scroll Wheel 2 Thumb Buttons for Laptop Computers - Newegg.com
Amazon.com: Logitech M545 Wireless Mouse – Side-to-Side Scroll Wheel and 2-Thumb Buttons Make Computer and Laptop Navigation Effortless, Ergonomic Shape for Right/Left Hand Use, USB Unifying Receiver, Black : Electronics