While not 100% hands-free, it's miles ahead of where robot vacuums were only a few years ago.
Milwaukee tools that users recommend avoiding include its M18 Compact Heat Gun and M18 Switch Tank 4-Gallon Backpack Sprayer.
Abstract: This article presents a wafer-level vacuum-packaged vertical resonant electric field microsensor (EFM), which uses an anodic bonded glass in silicon, silicon on insulator, and glass on ...