What we like
- Keeps an existing faceplate with a 39.5 × 33 × 16.8 mm module
- Supports momentary, latching and two-way wall switches
- $12.90 listed price for simple Matter switching
What could be better
- No energy monitoring or dimming
- MINI ONE PM adds metering in the same size case for $7 more
- Needs a neutral; 10 A maximum applies to resistive loads
A small retrofit with a strong new rival
SONOFF MINIR4M makes sense when the wall switch already looks right. Its 39.5 × 33 × 16.8 mm body sits behind the existing control in a suitable box, adding remote switching without replacing the faceplate. That is its appeal: the room can look unchanged while its lighting joins your smart home.
At SONOFF's listed US price of $12.90 on September 9, 2026, including tax as listed by SONOFF, with shipping and cart promotions separate, it is an inexpensive module. But the newer MINI ONE PM costs $19.90 and has exactly the same dimensions. The extra $7 buys energy monitoring, a higher resistive-load rating and local browser control. For a fresh installation, we would choose that model when any of those features has a purpose.
MINIR4M still has a clear case: you want inexpensive switching and nothing more. There is little reason to replace a working one merely because SONOFF now offers a more capable relay.
Your wall control can stay
The external-switch support is more useful than another ecosystem logo. MINIR4M accepts momentary, latching and SPDT two-way switches, giving an installer several ways to retain familiar physical controls. Household members do not have to reach for an app every time they want the light on.
SONOFF also offers a detached-relay mode, which separates the external switch from the relay's state. That can be useful when a smart bulb should remain powered. It is a native SONOFF setting, however, and does not establish that the wall input becomes an automation button in every Matter app. Do not buy the module for that wider promise.
The missing features are straightforward
This is one on/off output with no dimming and no consumption readings. Matter over Wi-Fi gives it a shared control path without a SONOFF hub or Thread border router; it does not turn an ordinary bulb into a dimmable one.
The module needs a neutral and professional mains installation. Its 10 A maximum is a resistive-load rating, rather than permission to switch any motor or appliance drawing less than 10 A. Its small housing also needs space for the wiring around it. Those are the relevant fit limits; the product is otherwise a fairly focused switch.
Buy it for the price, or spend the extra $7
Choose MINIR4M when retaining the existing wall hardware and minimizing the module cost are the priorities. Choose MINI ONE PM if you want to see what the circuit consumes or manage it through a local browser.
If the module can sit in a larger indoor enclosure, Basic Gen5 is cheaper again at a listed $5.99. Its much longer case makes it a different fit. MINIR4M's remaining advantage is inexpensive switching in a genuinely small package.
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