TP-Link Wireless Smart IoT Hub "Tapo H100", White, Siren, Doorbell//Reliable Long-Range Connections - Keep sub-devices connected at all times through the robust wireless network.Low-Power Wireless Protocol - Make connected devices work energy-efficiently, promising longer standby time. Smart Alarm - Coordinates with Tapo smart sensors to warn of danger or deter intruders.Smart Doorbell - Pair it with Tapo Smart Button to build your smart doorbell system, plus 19 ringtones to choose from.Tapo Ecology - Connect with up to 64 smart devices for an immersive and comprehensive smart home experience.https://www.tapo.com/en/product/smart-hub/tapo-h100/#tapo-product-spec