Fingerprint Smart Door Lock with Surveillance

The lock warns you when the batteries are getting low, so you have time to swap them long before it matters. If you ignore the warning or the batteries go flat while you are out, there is an emergency USB power port on the outside. Plug in any power bank or phone cable and the lock wakes up so you can get in. Your mechanical key works regardless.

It fits doors between 45 and 110mm thick in wood, steel, brass or stainless steel, which covers most standard front doors. Measure the thickness of your door edge before you order and you will know in ten seconds. If it turns out not to fit, send it back within 30 days.

Most people have it on the door in 10 to 15 minutes with a screwdriver and the hardware in the box. No locksmith and no appointment. Worth checking your existing handle set and mounting holes first, because a door that has never had hardware like this may need a little prep.

Fingerprint sensors can struggle with wet, very dry or very cold fingers. That is true of every lock with a reader on it, including this one, and we would rather say so than pretend otherwise. It is also exactly why there are four other ways in. Your passcode, your card, your phone and the mechanical key all work, so you are never depending on one method to get into your own home.

Yes. Each person can have their own fingerprint, their own passcode or their own card, and the lock holds up to 100 of each. A child, a parent or a housemate can let themselves in without an app, an account or an email address.

Yes. A cleaner, a dog sitter or a weekend guest can have their own way in while they need it and nothing once they do not. No key to cut, no key to chase down afterwards, and no spare under the mat that stays there forever.

The fingerprint, passcode, card and mechanical key all work on the lock itself with no internet, no account and no monthly fee. Wifi only comes into it for the phone features, like checking your door while you are out. There is nothing extra to buy to make the lock work.

Here is the straight answer. A smart lock is not automatically stronger than a good deadbolt, and anyone who tells you it is has something to sell. What changes is control. Nobody copies your fingerprint at a hardware store. You can remove someone's access in seconds instead of re keying the whole door. And you can check whether the door is locked instead of hoping. That is what people actually buy this for, and it is worth being honest about.

This lock is not rated waterproof, so it belongs on an interior door or an entrance with a porch, an overhang or some cover. If your door takes direct rain with nothing above it, this is not the right lock for you, and we would rather tell you now than take your money and have you send it back in three months.