Whole-Home Coverage - 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. Tapo Ecology - Connect with up to 64 smart devices (sensors, smart buttons, TRV) for an immersive smart home experience. Smart Alarm - Coordinates with Tapo smart sensors to inform you of security issues or other problems. Smart Doorbell - Works as your doorbell, with customized and adjustable ringtone