The standard transmitter, which I tested with the door lock, can deliver 100mW to devices within 10 meters; there’s a higher-powered one that can send 300mW at up to 5 meters.

The smart door lock has a net weight of 4g and adopts an aluminum alloy panel. It is suitable for doors sized between 40mm and 120mm while its dimensions are 473 x 185 x 105 mm. Xiaomi is yet to ...