The new Logitech Lift is a cheaper, colorful vertical ergonomic mouse with left-handed version and long battery life - NotebookCheck.net News
A Vertical Mouse that Doesn't Suck: (Logitech MX Vertical) - YouTube
Logitech MX Vertical review: Not the mouse upgrade you're looking for | Mashable
Logitech MX Vertical Wireless Mouse – Advanced Ergonomic Design Reduces Muscle Strain, Control and Move Content Between 3 Windows and Apple Computers (Bluetooth or USB), Rechargeable, Graphite - Walmart.com