The KMC Smart Plug 4-Pack is a set of white smart plugs that can be controlled via the KMC app or by using voice commands with Google Assistant or Amazon Alexa. These plugs feature three outlets on the side for added convenience and are compatible with a variety of devices. With an input voltage of 120V and a smart home protocol of Wi-Fi, these smart plugs offer a seamless and efficient way to control your smart home setup.