Another smart lock has entered the crowded market, and this one wants to read your veins. TCL’s new D2 series ditches fingerprints entirely and scans the vein patterns in your palm instead. The company claims 99.9999% accuracy under lab conditions. That’s a lot of nines.
The lineup includes three models: the flagship D2 Pro, D2 Plus, and basic D2. Each one uses the same palm vein tech that supposedly works whether your hands are dirty, wet, or wrinkled from age. TCL says it takes just 0.3 seconds to access. Wave your hand, door opens. No touching required.
Wave your hand, door opens in 0.3 seconds. Works with dirty, wet, or wrinkled hands.
This isn’t TCL’s first smart lock rodeo. Their previous D1 Pro hit number one on Amazon for locks priced above $150 last year. Now they’re back with built-in doorbells across the D2 lineup, because apparently smart locks need to multitask too.
The paranoid will appreciate one detail: all your biometric data stays on the device. No cloud storage, no servers, no hackers getting your palm vein patterns. Everything’s local. Your veins are your business.
Battery life matters when you’re locked out. These use rechargeable batteries with USB charging, and the app screams at you when power runs low. The D2 Pro packs a 10,000 mAh battery that TCL says lasts up to 240 days on a single charge. Standard models feature a 7800mAh lithium-ion battery with up to eight months of life based on 10 daily uses. Auto-lock kicks in if you forget to secure the door. The app also logs who comes and goes, sending notifications 24/7 about every lock event.
Voice control junkies get Alexa and Google Assistant integration. Multiple access methods exist for the tech-averse or backup scenarios: keypad, app, mechanical key, even RF cards. Options upon options.
TCL’s riding high on multiple “Best of CES” awards from 2025, which sounds impressive until you remember how many products win those things. Still, the tech works in all weather and lighting conditions, they claim. Rain, snow, darkness—your veins remain scannable.
Installation supposedly doesn’t require an engineering degree. Most residential doors work fine. There’s a 30-day return policy if things go south, plus warranty support. The mobile app holds your hand through setup. Being hardwired devices, the D2 series offers better security than many Wi-Fi dependent alternatives in today’s vulnerable smart home landscape.
Palm vein scanning for door locks. Sure, why not. The future’s weird.
