eufy Security FamiLock S3 Max: Palm Vein Smart Lock, 2K Doorbell, Rear Screen, Matter and HomeKit Ready

A smart, all-in-one front door solution

The eufy Security FamiLock S3 Max blends biometric access, advanced video, and a practical rear screen into a single front-door device. Built for modern homes, it emphasizes privacy, ease of use, and smart connectivity without overwhelming you with apps or complexity.

Palm Vein Unlocking for fast, private access

Rely on a forgery-resistant palm vein system that delivers quick recognition while keeping data on the device. With reported accuracy of 99.9 percent and unlock times around 0.6 seconds, you gain convenient entry that prioritizes local privacy and control.

• Fast, non-contact entry in under a second
• High-security biometric patterns stored locally
• Privacy-first design minimizes data exposure

2K HDR camera and wide-angle doorbell

The built-in 2K HDR camera uses an f/1.6 lens for sharp detail in various lighting. A 150-degree head-to-toe view helps cover porch activity, packages, and visitor checks. Night vision enhances visibility after dusk for confident monitoring.

• Clear day and night visuals with broad coverage
• Wide field of view reduces blind spots
• Night vision for porch security after dark

Rear Lock Video Screen for easy checks

The rear video screen enables front-door status checks without a phone, making it a practical option for families with kids or seniors who benefit from simple at-a-glance updates.

• App-free status viewing at a glance
• Ideal for households seeking straightforward access checks

A dual power system keeps the lock running with a rechargeable battery lasting up to four months, plus an emergency set of four AAA batteries extending functionality by another month during outages. This helps reduce downtime and simplifies maintenance.

• Up to 4 months of operation on a single recharge
• Emergency AAA backup provides extra resilience

The FamiLock S3 Max integrates with Matter and Apple Home, and works with Apple Home, Google Home, Alexa, and SmartThings via the eufy App. Important notes include that camera streams aren’t currently supported by Matter, and HomeBase 3 is now supported while HomeBase 2 is not compatible. For the best experience, use the eufy App for full features.

• Matter and HomeKit-style ecosystems for seamless automation
• HomeBase 3 compatibility enables concurrent use with other devices
• Camera streams may require the eufy App for full features

Imagine a door that recognizes a trusted palm and invites you in, while a doorbell captures crisp visuals of visitors and deliveries. The rear screen offers a simple way for elderly relatives to check who is at the door, and the overall setup supports a privacy-forward smart home experience that can adapt to daily routines without pushing you toward hype or guarantees.