TCL D2 Pro Palm Vein Smart Lock review: I feel like a sci-fi movie hero

When you purchase through links in our articles, we may earn a small commission. TCL's latest top of-the-line smart lock adds a doorbell and better battery to its impressive hands-free security tech. The TCL D2 Pro Palm Vein Smart Lock looks and operates like a device you'd see in a sci-fi movie. The touchless unlock feature is both captivating and rock-solid, but you might be disappointed that it doesn't support Apple Home or Matter. First, we ditched our housekeys for a numerical code that unlocked our doors, then we moved up to sometimes balky fingerprint readers.