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The Eufy FamiLock S3 Max is a deadbolt, a 2K video doorbell , and a small indoor monitor in one device. Right now it’s $279.98 on Amazon, down from $399.99, which price trackers list as its lowest price to date.
PCMag gave it an “excellent” rating and named it the best smart lock of 2025 (for more options, check out this roundup ). While that context helps justify the cost, it’s still a premium buy—you’re paying for convenience and consolidation. Instead of installing a separate lock, doorbell camera, and indoor display, this wraps all three into one setup with local storage.
In practice, that means fewer gadgets around your door and fewer apps to juggle. The exterior panel of this IP65 -rated smart lock houses a 2K HDR camera with a wide 180-degree view, so packages left at the edge of the frame are less likely to get cut off. At night, infrared kicks in automatically. The keypad stays dark until you tap it, then lights up clearly enough to use, and the palm vein scanner works quickly and consistently, which makes it more practical than fingerprint readers, which can struggle in bad weather. If you prefer traditional access, you can still fall back on a physical key, a passcode, the mobile app, or voice control through Amazon Alexa, Apple HomeKit, or Google Assistant.
Also, there’s a four-inch 1080p screen on the interior unit that shows a live view of whoever is outside, essentially replacing a peephole. That’s helpful in homes that never had one, or for anyone who prefers not to pull out their phone every time the bell rings. Power comes from a 15,000mAh rechargeable battery rated for up to five months, with four AA batteries as backup. It fits standard doors and installs like a typical smart lock, though the hardware is larger than most. As for its integrations and storage, it supports Matter , the cross-platform smart home standard, so you are not locked into one ecosystem. That said, it does not support IFTTT, which limits more niche automations. Video is stored locally on 15.5GB of built-in memory, which avoids a monthly fee, and it can expand up to 16TB through Eufy’s HomeBase 3 (sold separately).
