Sonoff Mini R4 Extreme

Product Introduction

The Sonoff Mini R4 Extreme (MINIR4) is an ultra-compact WiFi smart relay designed to convert traditional wall switches into fully automated smart switches. Installed behind existing switches or inside electrical junction boxes, the device enables remote control, scheduling, and smart automation of lighting and electrical appliances.

Powered by an advanced ESP32 processor, the Mini R4 delivers faster response times, improved connectivity, and reliable smart home integration. Through the eWeLink smart home platform, users can control connected devices from anywhere, create automation scenes, and integrate the switch into a broader smart home ecosystem.

Its extremely compact design—around 40% smaller than previous Mini models—allows it to fit inside even small wall boxes, making it ideal for discreet smart home upgrades without replacing existing switches.

Key Features

Ultra-Compact Design

One of the smallest smart relay switches available, designed to fit easily behind wall switches or inside mounting boxes.

ESP32 Smart Processor

Built on the ESP32 chip for faster processing, improved stability, and reliable smart home performance.

Two-Way Switch Control

Supports traditional wall switches, allowing manual operation while still enabling remote smart control.

Detach Relay Mode

Separates the external switch state from the relay state, allowing smart devices to remain connected even when the physical switch changes state.

eWeLink-Remote Gateway

Acts as a gateway for compatible wireless devices such as the Sonoff R5 and S-Mate, enabling local wireless control.

Smart Automation & Scheduling

Create timers, countdowns, and automation scenes through the mobile app.

Voice Assistant Compatibility

Supports voice control through compatible assistants.

Smart Home Integration

The Sonoff Mini R4 integrates with the eWeLink smart home ecosystem, providing centralized control and automation through a smartphone.

It supports voice assistant integration with:

• Amazon Alexa
• Google Assistant

The device can also interact with sensors, smart plugs, and other automation devices to create smart scenes such as lighting automation, arrival scenes, or energy-saving routines.

Technical Specifications

Product Type: Mini Smart Relay Switch
Model: MINIR4 (Mini R4 Extreme)
Connectivity: WiFi 2.4 GHz (IEEE 802.11 b/g/n)
Input Voltage: 100–240V AC, 50/60Hz
Maximum Load: 10A (up to approx. 2400W at 240V)
Processor: ESP32
External Switch Support: Momentary, latching, SPDT, and dry contact switches
Material: Flame-retardant PC V0 housing
Dimensions: Approx. 39.5 × 33 × 16.8 mm
Operating Temperature: −10 °C to 40 °C

What’s in the Box

Sonoff Mini R4 Extreme Smart Switch
Mounting screws
Quick start guide