TEQOOZ 1 Switch Smart Wi-Fi Retrofit (In-Wall) Module is a Wi-Fi enabled smart device, which can easily be installed behind any existing switchboard. This device has Solid ABS Plastic Case. It can operate appliances and electronics, and even schedule the same from anywhere - any part of the world, through SMARTLIFE App. The physical control of switch continues to remain as it is and does not get compromised in any manner. This device adds additional functionality of Mobile Control, Scheduling, Voice control etc.The Smart Switch can be removed and reinstalled any number of times anywhere. It can work ONLINE AS WELL AS OFFLINE, so physical functionality does not get affected if internet is not working. NO HUB REQUIRED: Teqooz Smart Switches are designed to be independent. No central hubs have to be set up. Teqooz switches connect directly to the WiFi network. The router setting should be at 2.4GHz.