Dual-SKU architecture · OEM ready
A smart lock that fits inside the door you already have.
Premium motorized locking in a 39.8 × 22.5 × 90.5 mm envelope. Mounts on the interior side — exterior escutcheons, keys and master-key systems stay untouched.
Form factor
39.8 × 22.5 × 90.5 mm
Exterior housing
Zero visible change
Enclosure
One-piece aluminum
OEM branding
Custom panel & colors
The line-up
One electronic drive core. Two ways to retrofit.
Mounts below the lever handle — no change to the door, handle or room.
Side by side
Which model fits the project?
| S1 · Surface | S2 · Euro cylinder | |
|---|---|---|
| Envelope | 39.8 × 22.5 × 90.5 mm | 39.8 × 22.5 × 90.5 mm (body) |
| Retrofit principle | Clamps over existing thumb-turn | Replaces entire Euro cylinder |
| Exterior keys | Original keys 100% retained | Supplied with matching keys |
| Compatibility | Thumb-turn / key turn locks | Euro profile DIN cutouts |
| Housing | Seamless aluminum shell | Seamless aluminum shell |
| Default color | Architectural Red-Brown | Deep Charcoal-Brown |
| Manual knob | Circular knurled thumb-knob | Horizontal turn-bar |
| Door prep | None (adhesive / clamp) | Remove cylinder set-screw |
| Typical use | Rental, smart home retrofit | Hotels, high-end residential |
Door compatibility check
Screen the door before you order.
Green · Compliant
Immediate retrofit
- — Standard Euro-profile mortise lock, smooth latch
- — Flat interior leaf, clear area below handle
- — Backset ≥ 50 mm; door thickness 35–85 mm
- — Key turns smoothly with two fingers
Amber · Conditional
Review recommended
- — Multi-point locks needing strong handle lift
- — Trim within 25 mm of the thumb-turn
- — Cylinder with severe key friction
Red · Incompatible
Not supported
- — Rim latch locks with oversized gearboxes
- — Warped doors needing shoulder pressure
- — Glass sliding doors without DIN prep
OEM customization
Your brand, your finish.
All exterior faces are neutral and ready for laser engraving, custom anodizing and decorative panels. Custom RAL / Pantone matching on qualifying batches.
Next steps for partners
Start an evaluation.
01
Request evaluation samples
Functional S1 or S2 units for fit, torque and material inspection.
02
Fast door compatibility review
Send 2 photos (interior face + latch edge) and door thickness for same-day clearance.
03
OEM branding & firmware
Logo placement, color variations and SDK/API integration specs.