SONOFF MINI Extreme R4 WiFi DIY Smart Switch
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Prices updated: 12 Oct 2026
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About this product
The SONOFF MINI Extreme R4 is an ultra-compact Wi-Fi smart switch module with a built-in relay, designed for DIY smart home projects. It lets you control a connected load remotely over Wi-Fi, making it useful for home automation experiments.
Specifications
- Connectivity
- Wi-Fi
- Type
- Smart switch with relay
- Form Factor
- Ultra-compact DIY module
- Application
- DIY smart home
Frequently asked questions
Does this module switch mains voltage?
It switches a connected load through an internal relay, and it is intended for mains-connected installations. Only a qualified person should wire it, with the power off, and you should follow the datasheet's rating and wiring instructions.
What is this module best used for?
It is used for DIY smart home projects, such as remotely switching lights or appliances over Wi-Fi. Check its rating against your load before installing it.
