Smart Relay Switch 1 (4pack) - Compact Matter-Compatible Relay

In this review of the Smart Relay Switch 1 (4pack) the bottom line is simple: this compact relay module is for homeowners and DIYers who want to add reliable remote and automated control to legacy lights and appliances without rewiring. The reviewer found the unit especially valuable for making old switches smart quickly, with a small footprint that fits most switch boxes and a clear path to voice control when connected to the Matter network or compatible smart speakers. Setup is straightforward, and the built-in Bluetooth repeater and Wi-Fi options keep devices responsive even when networks vary.

Key Features

• Built-in Bluetooth repeater: extends local connectivity so Bluetooth commands reach devices through walls or from other SwitchBot accessories.
• Matter-compatible control: enables direct integration with Apple Home, Alexa, Google Home and SmartThings for voice and unified automation once on a Matter network.
• No-rewire installation: the 1.65 x 1.45 x 0.63 in form factor fits most switch boxes and outlets for quick installation in about 10 minutes.
• Multiple control paths: use Wi-Fi for remote smartphone control and Bluetooth for reliable local control when the internet is unavailable.
• Automation and scenes: pairs with SwitchBot sensors and meters to trigger actions like lights on at door open or irrigation based on temperature and humidity.
• Safety features: V0 flameproof casing and over-temperature cutoff protect wiring and restore previous state automatically after power loss.

Who It's For

The Smart Relay Switch 1 is aimed at homeowners, renters and electricians who want to modernize lighting, fans or HVAC control without cutting new wiring; its compact size and simple install make it ideal for single-room upgrades and retrofit projects. Anyone invested in a Matter-capable smart home or who already uses SwitchBot sensors will get the most benefit from the automation options.

Those who should look elsewhere include people who require an out-of-the-box hub-free solution for every voice platform without configuring a Matter network, or installers who need heavy-duty industrial relays rather than compact home automation modules.

Pros & Cons

Pros

• Small form factor fits most switch boxes for easy retrofits.
• Flexible connectivity via Wi-Fi and Bluetooth keeps control reliable.
• Good automation options when paired with SwitchBot sensors and meters.
• Safety-minded design with flameproof casing and over-temp protection.

Cons

• Connection experience is mixed for some users until Matter or compatible speaker integration is configured.
• Requires a Matter network or compatible hub/speaker for native Apple Home integration.

Specifications

Product type	Smart relay module (1.65 x 1.45 x 0.63 in)
Connectivity	Wi-Fi 2.4 GHz and Bluetooth with built-in repeater
Voice platforms	Works with Alexa, Apple Home, Google Home, SmartThings (Matter/hub required)
Safety	V0 flameproof casing and over-temperature cutoff
Processor	ESP32
Installation time	About 10 minutes, fits most switch boxes

Our Verdict

The Smart Relay Switch 1 (4pack) is a practical, cost-effective way to smarten legacy switches and appliances without rewiring, offering solid automation potential and flexible connectivity. It is good value for users prepared to set up Matter or compatible voice devices and for anyone who wants a compact module that restores state after outages and adds local Bluetooth fallback for reliability.

Frequently Asked Questions

Does this work with Apple Home right away?
It supports Apple Home via the Matter protocol, but connection to the Matter network or a compatible hub or speaker is required for native Home integration.

Can it control lights if my internet is down?
Yes, local Bluetooth control remains available when the internet is unavailable, and the built-in repeater helps maintain connectivity.

Will it fit inside my existing light switch box?
The device is compact at 1.65 x 1.45 x 0.63 in and is designed to fit most switch boxes and outlets without rewiring.