The Wi-Fi retrofit module is installed directly into sockets, light switches or the power supply to lamps and allows devices to be switched on or off via an app, voice command or a timer. This saves you having to buy lots of individual Wi-Fi lamps, Controls the power supply of sockets, light switches and lamps, The module is universally suitable for all switch systems - there merely has to be sufficient space for the module at the installation location. The Wi-Fi camera can be installed without a gateway and integrated directly into your wireless network. High compatibility: Works with Amazon Alexa, Google Assistant, Siri Shortcuts, Home Connect Plus, iOS and Android, For a sustainable smart home. To set up the Wi-Fi switch, you need a device that runs under Android 4.3 or iOS 8 (or higher), and has the Hama Smart Home app installed. Should only be installed by a qualified electrician.