The Wise Fusion Dimmer Slave is a dimmer based around wireless communication technology that talks to a corresponding Wise Fusion Dimmer Master. What makes this product distinct is the wireless communication between a receiver unit and transmitter unit. The Wise Fusion Dimmer Master is designed to replace your existing light switch using the existing cables. It can then be synched to a number of Wise Fusion Dimmer Slaves that are completely wireless and can be placed around your house.