With a built-in altimeter, the L1 Ultra automatically detects elevation changes such as steps, slopes, and transitions ...

We've spent the past 12 months testing and reviewing hundreds of hardware and software products across 18 key technology ...

You can keep your floors clean without spending a lot of money. Check out the best cheap robot vacuums we've tested, all of which cost $300 or less. I'm PCMag's managing editor for consumer ...