smart padlock

Listings show fingerprint readers most commonly, and at least one model uses palm‑vein recognition. Product descriptions often include the device’s recognition speed (how quickly it identifies a fingerprint or vein).

Common emergency options shown are a physical/mechanical key, an external emergency charging port or the ability to connect a power bank/portable charger to briefly power the lock, and temporary power from an external charger to unlock when onboard power is depleted.

Smart locks typically support biometric unlocking (fingerprint or palm vein), numeric keypad/passcodes, smartphone app control (Bluetooth or Wi‑Fi), and a physical/mechanical key. Some models also support unlocking via wearables or voice assistants.

Storage capacity differs by model. Several listings show support for up to about 100 fingerprints, and some list passcode/password capacity up to around 50. Check the product specifications for exact limits for each lock.

Specifications vary by model: some list IP54 weather resistance and temperature ranges around 5°F to 122°F, while at least one listing shows a wider outdoor tolerance (about -22°F to 158°F). Check each product’s rating for exact environmental limits.

Many smart locks are designed for standard U.S. door thicknesses (around 1‑3/8" to about 2‑3/16"). Common backset options shown in listings include roughly 2.36" (60 mm) or 2.76" (70 mm). Bore‑hole specifications are not consistently listed, so check the product details before purchase.