Shelly 4Pro

WiFi-operated Quad Relay Switch



What is Shelly 4Pro?

Consumption history, anytime, anywhere

With Shelly 4 PRO you can monitor the status and history, as well as the current and past electrical power consumption for the day, week, month or year.


  • No HUB required.
  • Wide range of voltage support.
  • 4 channels
  • Overpower protection.
  • Power metering.
  • It can be integrated to work with all other Shelly devices.
  • Compatible with Android, iOS, Amazon Alexa, Google Assistant, and home automation servers using MQTT, CoAP, and REST API.
  • Easily make your Arduino project live and usable in your automation project.


Power supply AC 110-230V ±10%, 50/60Hz
Power supply DC No
Roller shutter mode No
Device temperature protection No
Overload protection Yes
Power measurement Yes
Channels 4 Channel
Maximum load 10A per channel
Operational temperature 0 to + 40 °C
Device power consumption < 1 W
Intelligent On/Off Yes
Local and remote control Yes
Sunrise/Sunset Yes
Weekly Schedule Yes
UL Listed option No
Wireless/WiFi 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 90mm x 52mm x 57mm

Wiring diagrams

How to connect

Use cases

Lighting control

Are you about to watch a movie, all set up on the sofa? Or you are going to bed and need to switch off all the lights? To avoid this, install Shelly 4Pro, and control your lights via your smartphone, or with your voice. You can control up to 4 electricity circuits.


Shelly 4 Pro – Make Your Own Smart Power Strip

Create a 4 outlet switched Smart power strip using a Shelly 4 Pro.

Learn More