TCL is a major name in consumer electronics, and their D1 Pro smart lock applies that engineering rigor to your front door. Its core technology is palm vein recognition, which scans the unique blood vessel patterns beneath your skin. This isn’t a fingerprint scanner. That distinction matters for reliability.

The system works with wet, dry, or dirty hands, and it doesn’t struggle with the light fingerprints of children or older users. You simply hold your palm near the sensor. Your biometric data is processed and stored locally on the lock itself, not in a cloud, which is a significant privacy consideration. You also have five other access methods, including a keypad, physical keys, and app control, all powered by a rechargeable battery.

Installation is straightforward, designed to fit standard single-cylinder deadbolt preparations. The all-metal construction feels substantial. While the palm vein tech is the headline, the practical result is a lock that offers consistent, hands-free access without the common frustrations of traditional biometrics.