Adesso iMouse E50 - Wireless Vertical Ergonomic Mouse 4-Way Mouse Wheel, 4-Way Mouse Wheel allows both vertical and horizontal scrolling. Ergonomic Vertical Design: The vertical design provides better support for your forearm minimizing wrist pain that can come from twisting. Back and Forth Switch Button. Quickly and easily navigate back and fourth on your web browser using the side buttons located right beside your thumb. 2.4 GHz Radio Frequency Wireless Technology. This mouse works at any angle with a range of up to 30 ft. with no wires to get tangled. 4-Way Mouse Wheel allows both vertical and horizontal scrolling.