Shelly is a sub-brand of a Bulgarian company, Alltarco, which recently began making its products available in the U.S. While it initially built its name on more contractor-level wiring components, the Shelly brand has expanded to include consumer-grade gear, including light bulbs, sensors, and this plug-in smart switch. It’s called the Shelly Plug US because it’s the U.S. version of its previous Shelly Plug S, which is designed for European sockets.
Design-wise, the plug offers only minor variations on a well-worn theme. The Wi-Fi device (2.4GHz only) supports a maximum load of 15 amps and wattage limit of 1,650 watts, but with just one three-prong socket located on the front of the device, you probably won’t be able to overload it easily.