Elgato Eve Energy (1st Generation) - Switch & Power Meter with Apple HomeKit technology, Bluetooth Low Energy Know your home: instantly see how much energy your devices are using Convenient control: switch your devices on or off with a simple tap or using Siri Gain insights: understand your energy consumption Homekit-enabled: unparalleled ease of use and advanced security Works with Siri: control your devices connected to eve energy with just your voice Easy setup: direct connection using Bluetooth Smart technology, no hub or gateway required