If you’re tethered to a computer all day and start to get agonizing pain from repetitive motions, don’t panic. There are lots of ergonomic devices out there to help, including the brand new Kensington SlimBlade Pro Trackball.

It’s like a mouse, but it doesn’t move. You roll the large trackball with your palm and click on the four huge buttons with your fingers or parts of your hand. And it doesn’t matter which hand you favor.