Product families
Three ranges, built around three different doors
A hotel corridor, a family front door and a retrofit office door do not need the same lock. Each family below is specified for one of them.

Smart Door Lock
Face recognition, fingerprint, card, code, app and mechanical key in one panel. This is the residential and light-commercial range: the D-series face.
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Hotel Door Lock
Locks built around how a property is staffed, not just how a door opens. Card hierarchies for housekeeping and front desk, free handles that survive.
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Keypad Lock
The retrofit range. Each model replaces existing hardware with a screwdriver and no new holes, in four formats: keypad deadbolt, fingerprint.
See the range →Selected models
Eight models buyers ask for most
Every model in the range is listed with its real specification: door thickness, credential capacity, battery interval and ingress rating. No model is listed without one.

D18 AI Smart Lock
AI dual-camera 3D face recognition with built-in video doorbell
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Submarine Waterproof Smart Lock
IP68 antifreeze 3D face lock for exposed entrances
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G1C Hotel Smart Lock
5-in-1 hotel handle lock with screen and Grade C cylinder
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K2 Smart Deadbolt Lock
Fingerprint deadbolt with 100-fingerprint capacity
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D1 Smart Lock
0.4 second 3D face unlock with anti-counterfeiting binoculus algorithm
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T2 Fingerprint Hotel Lock
5-in-1 hotel lock with SUS304 mortise and card hierarchy
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K3 Smart Knob Lock
Drop-in knob replacement with 0.5s fingerprint entry
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Z37 Smart Lock for Door
6-in-1 access with a camera outside and a display inside
View specification →Where they go
Access problems we get asked to solve
Each application page names the specific problem, the models that answer it and why.

Hospitality and Hotels
Hotels, motels, resorts and ski lodges run 24/7 and lose money to every lost key.
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Residential and Private Homes
Family front doors carry the widest mix of users: children, elderly residents, cleaners and deliveries.
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Rental and Short-Stay Properties
Short-stay listings turn over constantly and the host is rarely on site to hand anything over.
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Office Buildings
Offices need access that follows the org chart and changes the day someone leaves.
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Commercial Buildings and Retail
Shopfronts and commercial entrances face the street, the weather and long opening hours.
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Healthcare Buildings
Clinical areas need controlled, logged and hands-free access across long shifts.
Read more →Capabilities
What the range actually does
Six capability pages, each grounded in the models that carry it.
3D Face Recognition Access
Opening a door with nothing in your hands, without the lock being fooled by a photograph.
How it works →Fingerprint and Biometric Access
Biometrics that read reliably for every household member and keep the template on the device.
How it works →Hotel Card and Staff Access Management
Access that mirrors your staffing structure instead of a flat list of users.
How it works →App and Remote Management
Issuing, revoking and auditing access without going to the door.
How it works →Keypad and Code Entry
Keyless entry on doors with no network, and codes that cannot be learned by watching.
How it works →Weatherproof and Outdoor Entrances
Doors that face rain, snow, salt air and temperature swings.
How it works →About Ostuyad
A smart lock factory, not a catalogue
Dongguan Yidian Electronics Co., Ltd. is a high-tech enterprise in Dongguan, China that combines product research and development design, production, sales and service in one company.
Ostuyad has developed million-level laboratories in research and development capabilities, covering mortise and cylindrical locks, electromechanical products and systems. Every circuit board is tested to confirm its lifespan before assembly, and units pass waterproof, mildew-proof, high and low temperature, vibration and ageing tests.

Knowledge centre
Latest from our engineers

Future Home Security: Exploring Smart Locks with Voice Setup Features
What is Voice Setup? Why Choose Voice Setup Over Voice Control? Security : Directly controlling the lock’s operation through voice...
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How to Install a Smart Lock on a Wooden Door Using a Mortising Machine
Installing a smart lock on a wooden door can significantly enhance your home’s security and convenience. However, the process requ...
Read more →
The Future of Home Security: Voice-Controlled Smart Locks via App
In the age of smart homes, convenience and security go hand in hand. One of the most exciting advancements in recent years is the ...
Read more →FAQ
Questions buyers ask first
Are you a factory or a trading company?
Ostuyad is the brand of Dongguan Yidian Electronics Co., Ltd., a smart lock factory in Dongguan, China with its own R&D team, production instruments and production lines. Customers are welcome to come and inspect.
Do you accept OEM and ODM orders?
Yes. Several models in the range are explicitly specified for customized production according to customer requirements. Send your specification and we will confirm what is feasible.
Which platforms do your locks work with?
Depending on the model: Tuya, TTLock and dedicated apps, over WiFi and Bluetooth. The K4 also supports Alexa voice control through a WiFi gateway sold separately.
What is your minimum order quantity?
It varies by model. The hotel handle range is described as tiny minimums with no maximums. Confirm the figure for your model mix with our sales team.
How many models do you currently produce?
Seventeen, across three families: smart door locks, hotel door locks and keypad locks.
Can you supply locks for doors that are unusually thick?
Yes. The Z37 takes door thicknesses from 40 to 120 mm and the G1C from 45 to 120 mm.
Send us your door section and room count
We will come back with the models that fit, the credential capacity you need and a price.