Aqara’s U400 smart lock boasts hands-free unlocking

Smart home device manufacturer Aqara is showing its new Smart Lock U400 at CES. It’s among the first devices of its kind to combine Apple Home Key technology with an Ultra-wideband (UWB) radio to deliver hands-free unlocking when an authorized user approaches the door.

Provided you’re wearing your Apple Watch or your iPhone is in your pocket, purse, or backpack, you won’t need to touch the deadbolt to unlock it (compatibility with other smart devices is promised down the road). The trick...