Best face-recognition lock
eufy Smart Lock E40
Smart Locks15,000 mAh battery with 800 mAh backupNo subscription required
eufy’s first lock with 3D face recognition, pairing hands-free entry with a built-in entry camera.
What stands out
- 3D face recognition for keyless, phoneless entry
- Built-in 2K head-to-toe camera with night vision
- Backup battery and IP65 rating
What to watch for
Face recognition on an exterior lock is new; treat weather, lighting and spoofing resistance as open questions until it has been tested.
Specifications and ownership
Key specifications for eufy Smart Lock E40| Category | Smart Locks |
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| Best for | Best face-recognition lock |
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| Power | 15,000 mAh battery with 800 mAh backup |
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| Storage | Local; camera clips stored on device |
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| Subscription | No subscription required |
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| Works with | eufy Security, Matter |
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Researched from manufacturer documentation and current product listings. Last reviewed July 24, 2026. Specifications change without notice — confirm details with the manufacturer before buying. How we review.