TCL has unveiled a new smart home gadget, the D2 Pro smart door lock, in the US. TCL's new smart home accessory comes with AI-powered palm vein recognition that is advertised as being able to open the door in just 0.3 seconds. The smart lock also features a built-in 10,000 mAh rechargeable battery, doorbell, IP55 water resistance, Amazon Alexa, and Google Voice Assistant support.