Flexible Multi-Input Scene Control - Shelly i4 Gen3 supports four digital inputs, giving you the power to trigger scenes, execute custom actions, and manage your smart devices manually. Its the perfect way to bring centralized control to your smart home setup. Quick and Easy Retrofit Installation - Designed to fit behind most standard wall switches, Shelly i4 Gen3 installs in under 10 minutes. Upgrade your existing 4-button switch without rewiring and gain up to 16 programmable actions with a compact, unobtrusive design. Smart Control at Your Fingertips - Turn off lights, lower blinds, or launch automation scenes instantly with a press. Whether you're activating a 'Good Night' routine or opening the garage, Shelly i4 Gen3 makes it easy to manage your home from a single point.