The eufy Video Smart Lock S3 Pro combines advanced palm vein unlocking technology with a video doorbell function and a dual power supply system, ensuring long battery life and continuous power. Seamlessly integrating into your smart home ecosystem, it offers convenient automation for unparalleled convenience, security, and reliability. Ideal for the elderly, children, and the entire family, it provides peace of mind in various environments, allowing everyone to enjoy the benefits of smart home technology.