Keypad Smart Door Knob Lock: A Practical Look at the Yamiry Fingerprint Keyless Entry Handle Lock
Replacing a traditional deadbolt with a smart lock is one of the more noticeable upgrades you can make to a home’s entryway, and the Yamiry Keypad Smart Door Knob Lock is aimed at people who want keyless convenience without rebuilding their door. It combines a fingerprint reader, a keypad, and app-based control in a handle-style lock that is designed to fit most American standard doors. This review walks through what the lock offers based on the manufacturer’s stated features, so you can decide whether it fits your entryway.
Design and Build Quality
Yamiry describes the lock as being made from aluminum alloy, a material chosen for hardness and corrosion resistance. According to the manufacturer, this construction is intended to help prevent damage from the outside and contribute to the lock’s durability in demanding environments. The lock is also described as waterproof, which the company presents as part of its ability to work well in bad weather conditions.
The product is a door knob-style handle lock rather than a separate deadbolt, which gives it a familiar look and feel at the door. The keypad sits on the exterior and is backlit, a design choice that the manufacturer says allows the lock to be used in dark environments. That backlighting matters for anyone who regularly arrives home after sunset or who needs to enter a code without turning on an exterior light.
Installation is described as straightforward: the lock is compatible with most American standard doors and can be installed with just a screwdriver. The manufacturer also notes that the accompanying app is simple to use for programming the lock. These are stated claims rather than independently verified results, but they suggest the lock is positioned as a DIY-friendly upgrade rather than a job requiring a locksmith.
Features and Technology
The headline feature is the fingerprint reader. Yamiry states that it uses AI chips for fast recognition, unlocking in 0.3 seconds with 99.8% accuracy. Those figures come from the manufacturer and describe the intended performance of the fingerprint system. For everyday use, the appeal is obvious: a fingerprint unlock means no fumbling for keys when your hands are full.
The keypad includes an anti-peep function, which lets you add random numbers to your entry sequence so that anyone watching from a distance cannot easily read your actual code. The lock supports several code types, each with a different purpose:
- One-time codes can be set remotely for friends, guests, or delivery drivers so they do not have to wait at the door. Yamiry notes this feature can be created without connecting to the lock.
- Permanent codes are intended for family members and trusted people, and are set when connected to the lock.
- Recurring codes can be arranged for employees or cleaners when the lock is connected.
- Custom codes can be set to remain valid for a certain period of time when connected to the lock.
Locking options are equally varied. The lock supports auto-lock, app-based locking, and a manual lock that engages when you press and hold the “√” key on the keypad. Auto-lock can be turned on or off through the app, and a Passage Mode lets you keep the lock unlocked for a specific period of time — useful when you are moving things in and out of the house or expecting a series of visitors.
The app also handles user management, access logs, rental management, and a silent mode. A Safe Mode adds a layer of protection: after ten invalid codes are entered, the lock enters safe mode and can only be unlocked with the key or the app, with a three-minute wait to exit safe mode.
Connectivity and App Control
The lock connects via Bluetooth, and the app can store up to 50 passwords, fingerprints, and key fobs. That capacity is worth noting for households with several members or for rental situations where access needs to be shared and managed.
Remote features depend on the Yamiry gateway, which is sold separately. With the gateway, the lock connects to Wi-Fi and enables remote access from anywhere, real-time message pushes every time the lock is unlocked, and voice control through Alexa and Google Assistant. Without the gateway, those Wi-Fi-dependent features are not available, so buyers who want remote control or voice commands should plan for that additional purchase.
Power and Battery
The lock runs on four AA batteries, which are not included. Yamiry states that the lock will generally last up to one year depending on how frequently it is used each day. A low battery alarm sounds when power is running low, giving you advance notice before the lock stops working.
If the batteries do run out, the lock supports emergency backup power: you can charge it with a power bank to avoid being locked out. This is a practical safeguard for anyone who has ever worried about a smart lock dying at the wrong moment.
Performance and Everyday Experience
In daily use, the combination of fingerprint, keypad, app, key fob, and physical key gives you five ways to unlock, and three ways to lock. That redundancy is the real story here. If the fingerprint reader does not read on the first try, you can enter a code. If you forget the code, the key fob or key is there. If the batteries die, the power bank backup is there.
The anti-peep keypad and backlit display address two common entryway frustrations: privacy while typing and visibility in the dark. The one-time code feature is particularly useful for deliveries and short-term guests, since it can be created remotely without connecting to the lock. For rentals, the access logs and rental management tools in the app provide a way to track who has entered and when.
Who Is This Product Best For?
This lock suits homeowners who want keyless entry without replacing their entire door hardware, particularly those with American standard doors and basic DIY skills. It is also a reasonable fit for rental property owners who need to issue and revoke codes for guests, cleaners, or employees, and for households that want family members to have their own permanent codes. Anyone who wants remote access, voice control, or unlock notifications should factor in the separately sold Yamiry gateway, since those features depend on it.
Final Verdict
The Yamiry Keypad Smart Door Knob Lock packs a lot of entry options into a single handle-style lock: fingerprint, keypad, app, key fob, and key for unlocking, plus auto-lock, app lock, and manual lock for securing the door. The aluminum alloy construction, waterproofing claim, backlit anti-peep keypad, and one-time code feature all address real-world entryway needs. Battery life is stated at up to a year with four AA batteries, and the emergency power bank backup adds peace of mind.
The main caveat is that the remote and voice features require the Yamiry gateway, which is sold separately — so the lock’s full smart-home potential comes at an additional cost. Installation is described as screwdriver-friendly for most American standard doors, and the app handles user management, logs, and code scheduling. For buyers who want flexible, keyless entry with multiple fallback methods, this lock is worth a closer look. Just plan for the gateway if remote access matters to you.
