The GE Z-Wave In-Wall Add-On Smart Switch ZW2004 is a white smart switch that operates with an on/off method. It is designed to be installed in a wall and is used for controlling lights or other devices. This product is a Z-Wave model, ideal for creating a smart home system that uses the Z-Wave protocol for communication. With its compact size and sturdy construction, this smart switch is a reliable and efficient addition to any smart home setup, offering convenient control over various devices with ease.