Adesso iMouse M20B - Wireless Ergonomic Optical Mouse - Optical - Wireless - Radio Frequency - 2.40 GHz - No - Black - USB - 1500 dpi - Scroll Wheel - 6 Button(s) - Right-handed Only

Ergonomic Design - The iMouse M20 ergonomic design provides a comfortable grip and eliminates hand strain, while giving great cursor control. Battery-Saving - Use the battery-saving on/off power switch on mouse base to extend battery life and reduce the need to change batteries. 2.4 GHz Radio Frequency Wireless Technology - 2.4 GHz Radio Frequency Wireless Technology Adjustable DPI Switch - Quickly and easily adjust DPI resolution (800/ 1200/ 1600) for a faster response with the convenient DPI Switch located at the top of your mouse. Internet Navigational Buttons - Two Internet navigational buttons, back and forward, are conveniently located on the left side of mouse to provide you with Internet browser control with minimal hand movement.