The new Aqara Smart Lock U400 deadbolt uses ultra-wideband technology to unlock your door automatically as you approach, the company said at CES 2026 on Tuesday. No tapping or fumbling with your phone required. It makes Home Key use via iPhone or Apple Watch even more convenient.
“We are excited to be among the first manufacturers to deliver UWB technology in home locks to consumers,” said Cathy You, Aqara’s senior vice president of global business and strategy. “With the U400 lock, we’re redefining how consumers engage with their access control systems, providing instant, automated access without compromising privacy.”