eufy FamiLock S3 Max
Compatibility
| Ecosystem | Support | The catch |
|---|---|---|
| Amazon Alexa | Works | Lock control + doorbell announcements |
| Google Home | Works | Full support |
| Apple Home | No | No Apple Home support (no Matter) |
| SmartThings | No | Not supported |
| Home Assistant | Partial | Unofficial eufy integrations; lock support varies |
Protocols: WIFI · BLUETOOTH
Subscription reality
✓ Works without a subscription: Yes.
Doorbell-cam recordings stay local — no cloud fee
Maintenance reality
- Batteries: 15000mAh rechargeable + 4xAAA backup — expect roughly 5 months per set
- Cloud dependence: No — core function survives without the vendor's cloud
- 15,000mAh rechargeable pack rated ~5 months (eufy); camera use drains it faster than a plain lock. Three dead-battery fallbacks: an exterior USB-C emergency-power port (hold a power bank to it), a physical key, and 4 built-in AAA cells that kick in for PIN-code-only access when the pack runs flat (other functions pause until you recharge).
The catch
No Matter and no Apple Home — the lock-plus-doorbell combo locks you into eufy's app for the camera half.
Who it's for
Alexa/Google households that want lock + 2K doorbell cam in one device with 0.6s palm-vein unlock and no subscription.
Sources & method
2026-07 web research sweep (docs/02 catalog; primary sources cited there) — registry-and-press research, verified 2026-07-12 · eufy.com/products/e85v0jy1 (15000mAh rechargeable + 4xAAA backup, rated 5 months; exterior emergency-power interface + physical key + AAA PIN-only fallback; official unlock methods 'Palm Vein, App, Voice Control, Password, Keys' — palm vein at 0.6s / 99.9%, NOT fingerprint) — vendor-page research, verified 2026-07-15. This is a research profile: compiled from manufacturer documentation, certification registries, and published testing — we state facts, not verdicts, and we have not physically tested this unit. How we work →
Compatibility and lifecycle information reflects the last-verified date above and can change without notice (firmware updates, cloud-service changes, discontinuations). It is provided as-is, for information — verify with the manufacturer before purchasing. Spot an error? Tell us and we'll fix it. Full terms: Terms of Service.