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Black smart door lock with palm vein sensor, 2K camera, keypad, and interior video screen

eufy

eufy FamiLock S3 Max Smart Door Lock with Palm Vein Recognition

SKU CH-9DWB-TG4MB

A 3-in-1 keyless deadbolt with 2K HDR camera and doorbell that unlocks via palm vein recognition in 0.6 seconds with 99.9% accuracy

  • Product typeMax Smart Lock with Palm Vein Recognition
  • Product colorBlack
  • Key features2K Full HD Head-to-toe View, DualPower System, PIR+Radar Mot
  • Product dimensions3.07 × 1.22 × 7.87 in
  • Product weight5.48003
  • Palm vein unlock in 0.6 seconds with 99.9% accuracy
  • 2K HDR camera with 150° head-to-toe view and f/1.6 lens
  • Rear lock video screen for app-free door monitoring
  • Dual power system with 4-month rechargeable battery plus AAA backup
  • Matter protocol enables Apple Home and smart home integration

Palm Vein Recognition

The eufy FamiLock S3 Max combines a smart deadbolt, a 2K HDR camera and a video doorbell in a single ANSI/BHMA Grade 1 unit. It unlocks in 0.6 seconds using forgery-proof palm vein scanning with 99.9% accuracy. The system stores data locally for up to 50 family members and suits front doors 35 to 55 mm thick.

Rear Lock Video Screen

A built-in interior display lets occupants see who is at the door without opening a smartphone app. The 2K camera covers a 150° head-to-toe view with an f/1.6 lens for clear night visibility. PIR and radar motion detection trigger real-time visitor alerts, while the palm vein sensor works for unlocking only, not for locking the door.

Dual Power Supply

A rechargeable lithium battery delivers up to four months of full operation, backed by four AAA cells that add another month of essential functions if the main pack dies. The lock links to HomeBase 3 and other eufy cameras for remote control, and supports Matter for Apple Home integration, though it cannot connect to HomeBase 3 and external Matter gateways at the same time.

How it compares

Measured against everything we stock in Keyless Entry Locks & Readers, at today’s prices. Recalculated every night.

Price $332.99
Pricier than about 90% of the 274 comparable items (median $105.49).

Specifications

Product
Brand nameEufy
Model nameEufy FamiLock S3
Part numberE85V0
Product typeMax Smart Lock with Palm Vein Recognition
Product colorBlack
Size & build
Product dimensions3.07 × 1.22 × 7.87 in

Questions about this item

How often will the rechargeable battery need charging and what backup power is available?

The rechargeable battery lasts up to 4 months per charge; an emergency set of 4 AAA batteries provides an extra month of essential functions.

What limits how many family members can use the palm vein unlock?

The device stores palm vein data for up to 50 users; the vein pattern only unlocks the door and cannot lock it.

How much power does the lock draw when the 2K camera and video screen run all day?

The DualPower system combines a rechargeable lithium pack with 4 AAA backups to sustain continuous camera, doorbell and screen operation.

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