The Shelly devices that support power measurement are: Shelly 1PM and Shelly Plus 1PM Shelly 2.5 Shelly Pro Series devices Shelly EM Shelly 3EM Shelly Dimmer 2 Shelly RGBW2 Shelly Plug, Shelly Plus S, Shelly Plus US Shelly Bulbs – Duo, RGBW, Vintage