What kind of doors are eufy FamiLock S3 Max compatible with?

Compatible with most standard doors, door thickness:35-55 mm. Do not recommend to install on the door that has a storm door in front, which might block the view. If your latch recess is round, contact eufy Support to get a round drive-in faceplate.

Which eufy devices and systems are eufy FamiLock S3 Max compatible with?

It supports connection with Homebase 3 and it is not compatible with HB2. Without Homebase, it links to other eufy cameras, letting you remotely lock/unlock via live view on any device.

Does eufy FamiLock S3 Max support external integration with other smart home platforms?

It supports the Matter protocol. Through Matter, you can work with Apple Home to integrate into the Apple ecosystem. Currently, it cannot be connected to HB3 and external ecosystem gateways simultaneously.

What should be noted when using the palm vein unlocking function?

You can store palm vein information for 50 family members. The palm vein can only be used to unlock, not to lock.

What is the power supply method of this door lock? What happens if the battery runs out?

Our door lock uses a dual power supply with lithium and standard batteries. When the lithium battery is low, standard batteries provide emergency power, allowing PIN code access to lock/unlock, while other functions are unavailable.

eufy FamiLock S3 Max Smart Lock with Palm Vein Recognition - Keyless Entry Door Lock for Front Door, 3-in-1 Wi-Fi Keypad Deadbolt+ 2K HDR Camera+ Doorbell, ANSI/BHMA Grade 1, Rear Lock Video Screen

eufy FamiLock S3 Max Smart Lock with Palm Vein Recognition - Keyless Entry Door Lock for Front Door, 3-in-1 Wi-Fi Keypad Deadbolt+ 2K HDR Camera+ Doorbell, ANSI/BHMA Grade 1, Rear Lock Video Screen

Product ID: 731989289

Details

Brand
eufy Security
Item dimensions L x W x H
7.8 x 3.1 x 20
Lock Type
Biometric Door
Material
Metal Plastic

📹2K HDR camera with 150° wide-angle

🔋4-month rechargeable + AAA backup

🖐️99.9% accurate palm vein unlock

Description

🔐 Unlock the future of home security with a wave of your hand!

INSTANT VISITOR ALERTS - Stay connected with real-time notifications, ensuring you never miss a visitor or package drop-off.
CRYSTAL CLEAR 2 K HDR VIDEO - Monitor your doorstep day and night with a wide 150° head-to-toe view that leaves no blind spots.
PALM VEIN PRECISION UNLOCK - Experience ultra-fast (0.6s) and forgery-proof biometric security that’s uniquely yours.
USER FRIENDLY REAR VIDEO SCREEN - Check who’s at your door instantly without a smartphone—perfect for kids and elders.
FUTURE READY SMART HOME INTEGRATION - Seamlessly connect with Apple Home, Alexa, Google Home, and more via Matter for a privacy-first smart ecosystem.

The eufy FamiLock S3 Max is a cutting-edge smart lock combining 99.9% accurate palm vein biometric unlocking, a 2K HDR camera with a 150° wide-angle video doorbell, and a rear lock video screen for easy monitoring. Featuring a dual power system with up to 4 months of rechargeable battery life plus AAA backup, it integrates smoothly with major smart home platforms via Matter, delivering top-tier security and convenience for modern homes.

Specifications

ASIN	B0DTHMFMKP
Additional Features	2K Full HD Head-to-toe View, DualPower System, PIR+Radar Motion Detect, Wave to unlock with Palm, Works with Smart Home Platforms
Brand	eufy Security
Brand Name	eufy Security
Colour	Black
Connectivity Protocol	Wi-Fi
Control Method	Remote
Controller Type	iOS
Customer Reviews	4.4 out of 5 stars 271 Reviews
Included Components	Deadbolts & Deadbolts Screws, Exterior Assembly, Interior Assembly, Physical Keys, Rechargeable Battery & AAA Batteries x 4
Item Dimensions	7.8 x 3.1 x 20 Centimeters
Item Weight	1043 Grams
Item dimensions L x W x H	7.8 x 3.1 x 20 Centimeters
Lock Type	Biometric , Deadbolt , Video Door Lock, Video Doorbell
Manufacturer	eufy
Material	Metal, Plastic
Material Type	Metal, Plastic
Model Number	T85V0
Recommended Uses For Product	Home
Shape	Rectangular
Special Feature	2K Full HD Head-to-toe View, DualPower System, PIR+Radar Motion Detect, Wave to unlock with Palm, Works with Smart Home Platforms Special Feature 2K Full HD Head-to-toe View, DualPower System, PIR+Radar Motion Detect, Wave to unlock with Palm, Works with Smart Home Platforms See more
Style Name	Video Lock With Screen
UPC	194644232658

Reviews

S**S

Best door lock all the way through

31.01.2026

B**.

💯% recommend 👌

7.04.2026

A**R

ease of installation and the application is easy to use

17.12.2025

A**L

Nice

10.12.2025

V**A

Worest experience

6.02.2026

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews