What kind of doors are eufy FamiLock S3 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 compatible with?

It supports connection with Homebase 3 and it is not compatible with HB2. With Homebase, it links to other eufy cameras, letting you remotely lock/unlock via live view on any device.

Does eufy FamiLock S3 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. eufy is on standby for a beta solution.

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 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, Motion Sensor, No Monthly Fee

Product ID: 722783870

Secure Transaction

Details

Brand
eufy Security
Item dimensions L x W x H
7.8 x 3.1 x 20
Lock type
Deadbolt
Material
Stainless

🌿99.9% palm vein recognition accuracy

📸2K HDR ultra-wide angle camera

🔋4 months rechargeable + backup battery

Description

🔐 Unlock the future with a wave—security that’s smarter, faster, and undeniably sleek.

DUAL POWER ASSURANCE - Stay worry-free with a 15,000mAh rechargeable battery plus 4 AAA backups for nonstop protection.
SMART SENSOR ACCURACY - Cut false alarms by 95% with PIR & Radar dual sensors—security that’s both smart and reliable.
SEAMLESS SMART HOME SYNC - Effortlessly integrate with Apple Home, Alexa, Google Home & Matter for a future-ready connected lifestyle.
PALM VEIN PRECISION UNLOCK - Experience lightning-fast, forgery-proof access with 0.6s recognition—security redefined.
CRYSTAL CLEAR 2 K HDR SURVEILLANCE - Monitor your doorstep with a 150° ultra-wide lens that never misses a detail, day or night.

The eufy FamiLock S3 is a cutting-edge keyless smart lock featuring ultra-secure palm vein recognition with 99.9% accuracy and 0.6-second unlock speed. It integrates a 2K HDR camera with a 150° ultra-wide view for comprehensive front door monitoring, enhanced by PIR and Radar dual sensors to minimize false alarms. Powered by a robust 15,000mAh rechargeable battery plus AAA backups, it ensures uninterrupted security. Compatible with major smart home platforms including Apple Home, Alexa, Google Home, and Matter, it offers seamless automation without monthly fees.

Specifications

ASIN	B0DTHVNNXQ
Batteries	4 AAA batteries required. (included)
Batteries Required?	Yes
Batteries included?	Yes
Battery Cell Type	Lithium Ion
Best Sellers Rank	773,206 in DIY & Tools ( See Top 100 in DIY & Tools ) 431 in Home Security & Surveillance Biometrics
Colour	Black
Customer Reviews	4.1 4.1 out of 5 stars (144)
Date First Available	5 April 2025
Included Components	Interior Assembly, Rechargeable Battery & AAA Batteries x 4, Exterior Assembly, Physical Keys, Deadbolts & Deadbolts Screws
Installation method	Self-Adhesive
Item Weight	2.45 kg
Item model number	T85V0
Manufacturer	eufy
Material	Stainless Steel
Number of Pieces	1
Part Number	T85V0
Power Source	Battery Powered
Product Dimensions	7.8 x 3.1 x 19.99 cm; 2.45 kg
Shape	Rectangular
Special Features	2K Full HD Head-to-toe View, Auto-Lock, DualPower System, Wave to unlock with Palm, Works with Smart Home Platforms
Style	Video Lock without Screen

Reviews

S**J

Best Vein Smart Lock

25.11.2025

A**R

Impressive and great features

11.11.2025

J**.

Great Product

24.10.2025

J**G

Great all-in-one security, but the palm reader is a bit picky

21.01.2026

S**S

Well built

14.12.2025

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

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Abdullah B.

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

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

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Abdullah B.

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

3 weeks ago

View all Trustpilot reviews