Shelly 1 Gen4 is a one-channel smart relay with a potential-free dry-contact output, allowing the switched circuit to remain electrically separate from the device supply. Its support for both low- and high-voltage powering makes it suitable for applications such as lighting, heating controls, gates, doorbells, irrigation and contactor control.
Wi-Fi, Zigbee, Bluetooth and Matter are supported on the Gen4 platform, alongside schedules, scenes, local actions, scripting, secure web protocols and KNXnet/IP. The compact format is designed for retrofit installation behind existing switches and sockets where the wiring and load are within Shelly’s published limits.