Up to 64+4 Devices - Connect more devices (up to 64 switches*, sensors, or buttons + 4 cameras or doorbells) to create your home's smart ecosystem. Works with Tapo C420, Tapo C400, Tapo D230, and more. Smart Alarm & Chime - Works with your smart cameras (Tapo C420, Tapo C400), video doorbells (Tapo D230), and sensors as a smart alarm or chime when motion is detected or a visitor arrives. Local microSD Storage - Save recorded videos from your cameras or video doorbells to the hub-installed microSD card (up to 512 GB)† . 19 Ringtone Options - Multiple built-in ringtones (up to 90dB) for your customized scenarios. Low-Power Wireless - Helps your smart sensors and buttons last up to 10 times longer by adopting an ultra-low power wireless protocol**. Voice Control - Works with Amazon Alexa and Google Home for hands-free automation. PACKAGE CONTENTS - 1x Tapo H100 - 1x Quick Start Guide