Smart Lock U300: documented facts and connection routes for US users, with unverified details clearly marked.
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Identify the exact device
This Smart Lock has 7 documented field(s) in our research. A marketing model name can cover different hardware or regional variants. Check the label on your device before you use any connection guidance.
| Field | Recorded value |
|---|---|
| Brand | Aqara |
| Recorded model number | DL-D02D |
| Category | Smart Lock |
| US retail SKU | Not fully resolved |
| Stock | Not checked |
| Physical test | Not performed |
What official documents establish
| Documented field | Value | Evidence |
|---|---|---|
| Radio Protocols | Thread, Bluetooth, NFC |
|
| Battery | 4 x AA, 6 V |
|
| Emergency Power | USB-C 5 V DC |
|
| Outer Panel Dimensions | 140–76–73.5 mm |
|
| Inner Panel Dimensions | 159–74.5–76 mm |
|
| Outer Operating Temperature | -30–55 degC |
|
| Inner Operating Temperature | -10–55 degC |
|
Platform connection paths
No model-specific platform route is established in the supplied evidence. A controller role or radio alone does not prove accessory compatibility.
Every listed route remains conditional until the model, region, controller, network and feature requirements are checked in your home. No physical pair test was performed.
What to verify before setup or purchase
- Check door preparation, dimensions and an emergency access method; do not expose pairing, PIN, home-key or access credentials.
Use the device label, manufacturer app and current official support article to confirm your US variant and firmware. For switches, locks and thermostats, also verify the physical installation requirements before buying.
Explore Smart Lock U300 listings
This opens Amazon search results, not a verified listing. Results can include other generations, regional versions and third-party sellers. Match the model number, connection method and US installation or electrical requirements before ordering. We have not checked individual listings, prices or stock.
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Official documentation
- Aqara — U300 specifications Reviewed 2026-10-30
Source review date is not a live firmware or inventory check. Report a specific correction if a manufacturer document has changed.