Fingerprints wear out: cleaners, farmers, bricklayers and anyone over 65 with thin skin. Palm vein reads haemoglobin under the surface, so dust, dryness and a thin glove do not interfere.
What it changes in practice
- Tencent AI palm-vein + palm-print
- Works wet or dry
- Non-contact, hygienic for shared buildings
- Paired with 3D face
Honest limit: the silicon may be rated wider than the assembled lock. The cell and the display set the real range, which is why the face platforms are published at −20 °C to +40 °C.