The Decora Smart Wi-Fi 4-Button Controller provides sophisticated in-wall control of multiple Decora Smart Wi-Fi devices, room lighting scenes and whole house lighting activities. Pairs with Decora Smart Wi-Fi lighting controls and the My Leviton app to offer an "always there, always on" control center for smart lighting. Adjust devices, activate scenes in a room, or push one button to turn off every light in the home. The DW4BC requires hot, neutral, and ground wires, and does not directly connect to a load. The four buttons can be customized for control via the My Leviton app. Take it to the next level by ordering custom engraved buttons (Available in U.S. only). These can be designed and ordered at any time through the My Leviton app.