Build Your Tapo Security Ecosystem Smart living starts here with up to 64 smart sensors, buttons or switches + 4 cameras or video doorbells connected to your smart home ecosystem. All Devices in One Hub Connect up to 64 Sub-1G switches, sensors, or buttons + 4 cameras or video doorbells. Smart Alarm & Chime Use the hub as a smart alarm or chime to protect your home security by coordinating with your Tapo smart cameras, video doorbells, sensors, buttons, and more. Local microSD Storage Save recorded videos from your smart cameras and video doorbells to a microSD card (up to 512 GB), ensuring you to never miss anything. Ultra-Low Power Wireless An ultra-low power wireless protocol significantly extend your usage ensuring battery-powered devices last up to 10 times longer. Reliable Smart Actions No more fumbling in the dark with your hallway or bedroom lights turn on automatically as you pass by the sensor paired with your hub. Create more smart actions and enjoy reliable hands-free home automation. Voice Activated Works with Amazon Alexa & Google Assistant for hands-free life. Schedule & Timer Set your own schedule for multiple scenarios to get an automatic smart life. 19 Ringtone Options Multiple built-in ringtones(bark, siren, doorbell, and more) and adjustable volume for your customized scenarios.