Manejo Ergonomic Wireless Usb Vertical Mouse, BlackDaily monotonous tasks using a standard computer mouse can cause permanent injury to your shoulder, arm and hand. This is why renowned physiotherapists recommend ergonomic vertical mice as an alternative, such as the manejo ergonomic vertical mouse. Thanks to its vertical shape, your wrist always stays in a relaxed, neutral position even when performing repetitive movements. It's the stylish way to prevent chronic cramps and strain. Features 2. 4ghz