The smart lock is one of the most-used smart home devices: no lost keys, temporary codes for workers and guests, and a log of who came in and when. But the choice depends on the door and on the unlock method that suits the household. This guide covers the points that decide the choice, with NEXSMART models available in the Fu-Mech online store.
Key points
- Establish the door type and thickness before choosing the lock.
- Unlock methods: fingerprint, PIN, card, app, and face on some models.
- The mechanical key stays for emergencies.
- NEXSMART locks run on 4 × AA batteries and connect over Wi-Fi.
How a smart lock works
The lock has two panels: an outer one with the fingerprint reader, keypad and card reader, and an inner one with the batteries and handle. It connects over Wi-Fi so you manage users from the app, add or cancel a temporary code, and see the entry log.
What decides the choice
- Door type: wood, steel, aluminium or glass; there is a dedicated model for aluminium doors, NEXLK-G-W.
- Unlock method: fingerprint is fastest for the family, face is easier with full hands, NEXLK-F1-W, and cards suit workers.
- Remote management: all models connect over Wi-Fi.
- Door-open alerts: add the NEXSE-DH-Z door sensor.
NEXSMART models
| Model | Unlock methods | Note |
|---|---|---|
| NEXLK-B-W | Fingerprint, card, PIN, key, app | Die-cast aluminium, 4 × AA |
| NEXLK-B1-W | Fingerprint, card, PIN, key, app | Die-cast aluminium, 4 × AA |
| NEXLK-F1-W | Face, fingerprint, card, PIN, key, app | Face recognition |
| NEXLK-G-W | Fingerprint, card, PIN, key, app | For aluminium doors |
The critical point: measure before buying
Warning
Measure the door thickness and the existing lock cut-out before ordering, and keep the mechanical key somewhere safe outside the home. Replace the batteries regularly before they run out.
Installation steps
- Measure the door and confirm it fits.
- Remove the old lock.
- Fit both panels and the lock body.
- Insert the batteries and test with the key first.
- Register the admin and users and link the lock to the app.
Common mistakes
- Leaving the default code unchanged.
- Registering only one fingerprint per person.
- Letting the batteries run completely flat.
- Ordering a lock that does not suit the door type.
Buy from our store
Every product in this guide is sold directly in the Fu-Mech online store. Press “Buy in store” next to a product to open its store page, or open the product page for specifications and the datasheet.
| Model | Product | Buy |
|---|---|---|
| NEXLK-B-W | Smart Door Lock — Fingerprint, Card, PIN | Buy in store ↗ |
| NEXLK-B1-W | Smart Door Lock — Fingerprint, Card, PIN | Buy in store ↗ |
| NEXLK-F1-W | Smart Door Lock with Face Recognition | Buy in store ↗ |
| NEXLK-G-W | Smart Lock for Aluminium Doors | Buy in store ↗ |
| NEXSE-DH-Z | Zigbee Smart Door & Window Sensor | Buy in store ↗ |
Frequently asked questions
What if the batteries run out?
The mechanical key still opens the door, so keep it safe and replace the batteries early.
Can I give a worker a temporary code?
Yes, users and codes are managed from the app.
What is the difference between NEXLK-B-W and NEXLK-F1-W?
The second adds face-recognition unlocking.
References
- NEXSMART — NEXLK-G-W datasheet and model data on the product pages
Product information comes from its pages on this site and NEXSMART data; other points are general practice. Electrical connections should be made by a qualified electrician.
