Provide next-level security at your doorstep with eufy FamiLock S3 Max video smart lock. Featuring palm vein unlocking, it offers secure, user-friendly access for all ages, and is more reliable than fingerprint unlocking. PowerDuo with dual power systems ensures uninterrupted operation. This lock supports the Apple Home app or Siri for seamless control. | eufy FamiLock S3 Max Video Smart Lock with Palm Wave Unlock - Exclusive Retail Partner