Electrical relay Shelly i4 Gen3 Orange Wi‑Fi 2.4 GHz 1 W 110–240 V 4‑channel

The Shelly i4 Gen3 is a compact Wi‑Fi operated 4‑digital input controller designed to be installed behind standard wall switches. It provides manual control of scenes and devices, supports multi‑click actions and scripting, and connects directly to a 2.4 GHz Wi‑Fi network without a hub. With wide voltage support (110–240 V AC), low power consumption (typical 1 W), and a small form factor (42 × 37 × 17 mm), the orange Shelly i4 Gen3 is suitable for retrofit installations and integration with other Shelly devices or third‑party products via HTTP and MQTT.

Advantages

Shelly i4 Gen3 offers Bluetooth and Wi‑Fi connectivity for easy setup and operation, up to 16 configurable actions via multi‑click support, and full mjS scripting for custom behavior. It uses Shelly’s own Gen3 chip with 8 MB memory for improved performance and smoother future updates, and is designed to be upgradable to Matter. Virtual components in the Shelly Smart Control app allow integration of non‑Shelly devices into a unified control interface.

Suitable for

• Retrofit installation behind existing 4‑button wall switches
• Triggering scenes and automations for lights, blinds, and security
• Controlling other Shelly relays, sensors, or devices via HTTP/MQTT
• Use in homes requiring compact, low‑power input controllers (110–240 V AC)

Key specifications

• Product name: Shelly i4 Gen3 (orange)
• Inputs: 4 digital inputs
• Wireless: Wi‑Fi 2.4 GHz; Bluetooth
• Power consumption: typical 1 W
• Input voltage: 110–240 V AC
• Memory: 8 MB
• Dimensions: 42 × 37 × 17 mm
• Weight: 18 g
• Protocols: HTTP, MQTT; supports mjS scripting
• MPN: Shelly_i4_Gen3; EAN: 3800235261828

How to use

Install the Shelly i4 Gen3 behind a compatible wall switch following the wiring instructions provided by the manufacturer; the compact module fits into most switch consoles and typically installs in under 10 minutes. Connect the device to your 2.4 GHz Wi‑Fi network (no hub required) or add it via Bluetooth for initial setup. Configure multi‑click actions, scenes, and mjS scripts in the Shelly Smart Control app, and link the i4 Gen3 to other Shelly or HTTP/MQTT‑capable devices to create automations.

Recommendations

Place the Shelly i4 Gen3 behind standard wall switches with sufficient enclosure space. Ensure a stable 2.4 GHz Wi‑Fi signal or use Bluetooth during setup. Verify compatibility of connected devices and follow electrical safety guidelines when working with 110–240 V AC installations.