Sonoff smart switch

Description

A Sonoff smart switch is a compact [wireless relay module](https://hobbycomponents.com/sonoff/947-sonoff-basic-wifi-wireless-smart-switch) designed to retrofit into a home’s electrical system, turning standard light switches and appliances into smart, automated devices. Installed directly into standard in-wall junction boxes, it sits [hidden behind an existing physical wall switch toggle](https://sonoff.tech/products/sonoff-zbmini-extreme-zigbee-smart-switch-zbminil2). This design bridges physical manual control with digital, app-driven automation. [1, 2, 3, 4]
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## Core Functionality

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* Dual-Control Operation: Integrates with existing physical toggle or rocker switches, maintaining full manual control over lighting circuits. If the physical switch is flipped, the smart system updates instantly, preventing smart bulbs from going offline. [5, 6]
* Cross-Protocol Integration: Connects via Wi-Fi, Zigbee 3.0, or Matter over Wi-Fi. Matter-enabled models provide local network communication, running automations even if the internet goes offline. [5, 7, 8, 9]
* Ecosystem Compatibility: Bypasses locked brand apps to link directly with mainstream smarthome platforms including Apple Home, Amazon Alexa, Google Home, and Home Assistant. [8, 9]
* No-Neutral Engineering: Includes specialized ultra-compact hardware profiles engineered for older infrastructure lacking a dedicated neutral line at the switch box. It draws microscopic operational power directly from the active lighting circuit. [1, 10, 11]
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## Key Technical Product Options

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* Sonoff MINIR4M (Matter over Wi-Fi):
* Design: Tiny in-wall relay module measuring 39.5 x 33 x 16.8 mm.
* Specs: [100-240V AC input/output with a 10A max load capacity](https://smarthomescene.com/reviews/sonoff-matter-minir4m-smart-switch-review/). Built on an ESP32 chip with Bluetooth pairing.
* Use Case: Best for setups requiring direct, hub-free local pairing into Apple Home or Google Home ecosystems. Requires a neutral wire. [9, 12, 13]
* Sonoff ZBMINIL2 Extreme (Zigbee 3.0):
* Design: No-neutral micro-sized relay measuring 39.5 x 32 x 18.4 mm.
* Specs: 100-240V AC input/output supporting up to a [6A max load (300W Max for LED bulbs at 240V)](https://smarterhome.sk/en/switching-relay-modules/sonoff-zbminil2-extreme-zigbee-smart-switch-no-neutral-required-1802.html).
* Use Case: Tailored exclusively for retrofitting older homes lacking neutral wires. Requires a compatible Zigbee hub to function. [1, 6, 10, 14, 15]
* Sonoff Basic Gen 5 (Matter over Wi-Fi):
* Design: Exposed inline plastic enclosure with integrated strain-relief caps for cord modification.
* Specs: Single-channel 10A switch utilizing [Matter over Wi-Fi infrastructure for universal ecosystem pairing](https://sonoff.tech/products/sonoff-basic-gen5-matter-over-wifi-smart-switch-basic-1gs).
* Use Case: Ideal for external appliance wiring, floor lamps, and extension cords. [16, 17, 18]
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