Shelly Plus i4

Shelly Plus i4

4 digital inputs controller

Shelly Plus i4 is an input reader device (it does not contain relays).

What is Shelly Plus i4?

1 circuit Wi-Fi relay switch

Shelly Plus i4 allows you to manually activate or deactivate any created scene, run synchronized actions, or execute complex trigger scenarios. You can use Shelly Plus i4 to control other connected Shelly relays, sensors, or HTTP and MQTT-controlled devices. Small enough to behind every wall switch, Shelly Plus i4 can show the status and control the action of four inputs.


  • No HUB required
  • Wide range of voltage support
  • Multi-click support with up to 12 possible actions (will be higher with next firmware updates)
  • 4 AC inputs
  • Scripting, bluetooth, schedules and webhooks


Power supply AC 110-230V ±10%, 50/60Hz
Power supply DC No
Complex scenes control Activate or deactivate synchronized actions of several Shelly devices
Overload protection No
Power measurement No
Working without a neutral line No
Inputs 4 inputs
HTTP/HTTPS webhooks Yes
Custom scripts(mJs) Yes
Operational temperature -20° to + 40 °C
Device power consumption < 1 W
Local and remote control Yes
Sunrise/Sunset No
Weekly Schedule No
UL Listed option No
Wireless/Wi-Fi Protocol 802.11 b/g/n
Radiofrequency 2400 – 2500 MHz
Radio signal power 1mW
Range up to 50 m outdoors and up to 30 m indoors (depending on the building materials)
Size 42x38x17 mm

Wiring diagrams

How to connect

AC power supply

Shelly i4 & Shelly Wall switch – 4 buttons