This SmartDrive is by Permobil, a company that makes mobility solutions for those with disabilities. It's a wheelchair add-on that provides a power assist, making it easier for users to open doors, deal with inclines, or simply travel further while reducing fatigue.Users control the device by means of either a wired speed controller, or via smartwatch. If using the latter option, users double-tap their hand against a surfacetheir knee, or the wheelchair itselfin order to start and stop. I was curious as to how well this would work, and you can see a demonstration in the user review below, where the reviewer runs down the good and the bad of the device:It seems the connectivity issues need to be addressed, which is a technical issue. On the physical design front, they could certainly use a better way to attach the device to the wheelchair; it looks incredibly frustrating.The units retail for $229.