eufy S3 Max Smart Lock Deadbolt
Where to Buy
| Retailer | Price | Last seen | Buy |
|---|---|---|---|
 amazon Sold by EufyHome | $279.99 | Dec 27, 2025, may have changed | Buy Now |
 kohls | $299.99 | Dec 27, 2025, may have changed | Buy Now |
 homedepot 90-day returns (in store too) | $299.99 | Dec 27, 2025, may have changed | Buy Now |
 Best Buy 15-day returns (in store too) · free return shipping · free shipping on $35+ | $329.99 | Jul 21, 2026, may have changed | Buy Now |
 dell 30-day returns · free shipping | $399.99 | Dec 27, 2025, may have changed | Buy Now |
Prices are collected from retailer listings; each row shows the date we last saw that price. Return and shipping terms are each store's standard policy from our retailer research (April 2026). Some products and categories have different terms, so check with the store before you buy.
Pros
- •Combines smart lock, 2K video doorbell, palm vein scanner, keypad, physical key access, and AI security camera all in one device, offering multifunctional home security.
- •Palm vein recognition provides fast, keyless, and accurate entry for multiple users, especially convenient when your hands are full.
- •Clear video quality with smart notifications for people detection and remote viewing enhances overall home monitoring.
- •Seamless integration with the Eufy ecosystem and HomeBase allows for secure, easy-to-use smart home connectivity.
- •Auto-locking feature triggered by camera and local AI detection of door closure adds a layer of convenience and security.
- •Local storage for video recordings with easy phone downloads means no extra hub or cloud subscription required.
- •Straightforward installation and user-friendly app setup process simplify initial use.
- •Includes a rechargeable battery with backup power options to reduce reliance on physical keys.
- •Solid build quality with thoughtful features like a screen to view visitors without needing a peephole.
Cons
- •Palm recognition, although reliable, can be slower than some users expected, impacting unlocking speed.
- •Keyhole cover may feel loose, and the number pad can show wear or oil marks over time, requiring occasional cleaning.
- •Limited adjustments during installation can lead to small gaps around the door hole, potentially impacting aesthetics or fit.
- •Some users experienced initial confusion about key duplication capabilities and wished for clearer communication on this feature.
- •People detection sensitivity and range settings are somewhat limited, occasionally causing false alerts in normal day-to-day activity.
- •The nonstandard key design can make duplication more challenging, which might inconvenience some users despite backup options.
- •Minor issues with unlocking via physical key reported but generally resolved with customer support.
Bottom Line
The eufy S3 Max Black Thumb-Turn Smart Lock Deadbolt is a highly innovative and well-rounded home security solution that combines keyless palm recognition, video doorbell functionality, and AI-powered smart locking into one device. While the palm scan can be slightly slower than anticipated and installation has minor quirks, the overall security, integration, and convenience justify its premium. If you want a single device that covers multiple home entry and monitoring bases with good local storage and payment-free cloud use, this is a strong choice. For an alternative focusing solely on smart lock features but with different biometric options, consider exploring other eufy smart lock models.
What Reviewers Are Saying
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Discussion
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