eufy Security Smart Lock Touch + Fingerprint + Wi-Fi

eufy's deadbolt, and the one lock here with a proper brand behind it: an app that is not a white label, a company that publishes its own manual, and a frame of zinc alloy and stainless steel tested to 250,000 cycles.

• How the eufy fingerprint deadbolt reads a finger
• No bridge, no hub
• Measure your door before ordering this deadbolt
• Deadbolt, not mortise

Your finger is the key. It reads in 0.3 seconds and the door is open inside a second. It holds 50 fingerprints and 100 access codes of four to eight characters, and there is a keypad and a mechanical key as well. Wi-Fi is built into the lock, so there is no bridge and no HomeBase to buy, and it works with Alexa and Google Assistant.

A sensor knows when the door has shut and locks it behind you, which is the feature that actually changes behaviour: nobody has to remember. The outside is rated IP65, so rain is not a problem.

Check the door before you order. This is a deadbolt, the American style fitting, not a European mortise. It needs a door 35 to 55 mm thick with a 60 or 70 mm backset and a round bore. If your door has a euro cylinder instead, look at the fingerprint cylinder or one of the mortise locks. The battery is a 10,000 mAh rechargeable pack, charged by micro USB, rated by eufy at about a year at ten openings a day.

How the eufy fingerprint deadbolt reads a finger

The reader sits on the outside face and takes 0.3 seconds to recognise a print, with the bolt clear about a second later. It holds 50 fingerprints, which is more than a household needs and enough for a small office, and 100 access codes of four to eight characters for anyone you would rather not enrol.

A door closed sensor drives the auto-lock. That is the feature that changes behaviour rather than adding a gadget, because nobody has to remember anything: the door shuts and locks itself behind whoever left last.

No bridge, no hub

Wi-Fi on 2.4 GHz is built into the lock, along with Bluetooth 5.0, so there is no HomeBase and no separate bridge to buy. It runs in the eufy Security app and answers to Alexa and Google Assistant. Security is an ECC chip with AES 128, and the outside assembly is rated IP65 against rain.

The body is zinc alloy and stainless steel, tested by eufy to 250,000 cycles.

Measure your door before ordering this deadbolt

This is the American style deadbolt fitting, not a European mortise, and that is the one thing to settle before you buy. It needs a door 35 to 55 mm thick, a backset of 60 or 70 mm, and a round cross bore of 54 or 38 mm. If your door carries a euro cylinder instead, a fingerprint cylinder or one of the mortise locks is the right shape and we will point you at it.

Power is a 10,000 mAh rechargeable pack charged over micro USB, which eufy rate at about 365 days at ten openings a day.

Deadbolt, not mortise

This is the American fitting: a round bore through the door, a bolt into the frame. It wants 35 to 55 mm thickness, a 60 or 70 mm backset and a 54 or 38 mm cross bore. If your door carries a euro cylinder instead, this will not go in and a cylinder or mortise lock is what you want.

Send us the measurements and we will settle it in one message. Once it is in there is no hub to buy, the Wi-Fi is in the lock. eufy publish the manual at eufy.com, and the rest of ours is in smart locks.