This VerticalMouse 4 from Evoluent is a right-handed mouse made specifically for Mac Systems. It's ergonomically shaped with an upright design to keep your arm in a neutral position without it being twisted to help reduce wrist pain. Built with an adjustable optical sensor, it tracks accurately and adapts to your preference via four pointer speed settings. For additional functions, it has two thumb buttons and supports the Evoluent Mouse Manager, a downloadable software used for customizing mouse settings and programming buttons. Power it with a single AA battery, which can last up to three months depending on use, and pair it to your Mac via Bluetooth 4.2 for comfortable, cable-free use.