1x wireless reciever required per gang switch. This receiver can be used to switch 240V LED lighting, including pendant lighting & bathroom fans. You can also dim connected lights (with a dimmable light source). Lighting can be controlled manually by using the Wireless Kinetic Switch, through a Smart Phone or Tablet using the Smart Life App (free downloadable app via the QR code on the instruction leaflet), or by connecting it to a voice controlled intelligent personal assistant such as Amazon Alexa or Google Home. IP67 Rated - suitable for installion anywhere in your home, including bathrooms.