The LiftMaster myQ Smart Garage Control Hub & Sensor with WiFi and Bluetooth 821LMC-S is a wall-mounted smart garage door opener that operates on electric power. It features a sleek white design and is compatible with Amazon Alexa for convenient voice control. The hub and sensor work together to provide a secure and convenient way to open and close your garage door from anywhere using your smartphone or other connected devices. With its direct drive type and smart home capabilities, this LiftMaster product is a modern and practical addition to any residential garage.