The SONOFF MINI-ZB2GS (MINI DUO) is an ultra-compact, dual-channel Zigbee 3.0 smart switch module that upgrades your existing wall switch with smart features – without changing its appearance. Designed to fit into standard electrical boxes, it can control two independent lighting circuits and supports up to a total of 16 A (maximum 10 A per channel, resistive load). Includes timer functions, scenes, and group control.
The built-in Zigbee signal repeater improves network stability, while support for external wall switch inputs preserves familiar manual control. It’s compatible with popular platforms (e.g., Home Assistant – ZHA/Zigbee2MQTT –, Alexa, Google Home, SmartThings), allowing seamless integration into your smart home ecosystem.
Ideal for retrofits or smart upgrades when you want to control two circuits discreetly via an in-wall module – with quick installation and reliable Zigbee connectivity.
About SONOFF
SONOFF (ITEAD) is one of the most recognized brands in the DIY smart home community. Their affordable yet versatile Wi-Fi and Zigbee devices offer easy setup, stable performance, and wide compatibility with platforms like eWeLink, Home Assistant, Google Home, and Amazon Alexa.
Main Features
- Dual channel, compact design: control two independent circuits from a single in-wall module
- Reliable Zigbee 3.0: fast pairing, stable network with built-in Zigbee repeater functionality
- External switch support: works with both toggle and momentary switches; switch type can be changed via the module's button
- Schedules & scenes: timers, group control, and smart scenes for convenient automation
- Power-On State: configure device behavior after power outage (ON/OFF/last state)
Smart Home Protocols & Platform Compatibility
- Protocol: Zigbee 3.0 (IEEE 802.15.4)
- Supported gateways/platforms: SONOFF ZBBridge-P/-U, NSPanel Pro, iHost, ZBDongle-P/-E; works with Home Assistant via ZHA or Zigbee2MQTT
- Voice control & ecosystems: Amazon Alexa, Google Home, Samsung SmartThings (hub-dependent)
- Local automation: scenes and rules within the Zigbee hub; onboard LED and button assist with pairing and status indication
Smart Functions
- Remote ON/OFF & state reporting: control and monitor via app or hub
- Schedules & timers: time-based automation for daily routines
- Scenes & groups: synchronized control of multiple devices (e.g., room-based automation)
- External switch modes: toggle between momentary or rocker switch; selectable via triple press of the module button
- Advanced settings (Zigbee2MQTT): features like detach relay mode, external trigger mode, and impulse switching available (depending on firmware/hub)
Technical Specifications
- Product/series: MINI DUO / MINI Extreme series
- Type: 2-gang Zigbee smart switch (neutral wire required)
- Model: MINI-ZB2GS
- MCU/radio: Silicon Labs EFR32MG21 (Zigbee 3.0)
- Power supply: 110–240 V~ 50/60 Hz (single phase)
- Rated load: 10 A per channel; max. total 16 A (resistive load)
- External switch inputs: S1 (circuit 1), S2 (circuit 2); must not be connected to neutral or ground
- Recommended wiring: 16–14 AWG solid/stranded copper
- Dimensions / weight: 45 × 39.4 × 16.8 mm; ~36.2 g
- Housing / color: PC, white
- Operating environment: indoor use; −10…+40 °C; 5–95% RH (non-condensing)
- Certifications: CE / FCC / RoHS
- Button functions:
- Press 5 sec – pairing mode
- Triple press – toggle external switch mode
- Press 10 sec – factory reset
Additional information
| General |
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| Electricity properties |
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| 2-way or 3-way switching | 2-way switches, 3-way switches, multi-button switch |
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| Smart home protocols |
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| Remote control, smart control |
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| Cloud mode | depending on the hub/gateway |
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| More features |
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| Colour | white |
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| Conductor cross section | 1,63 mm2 |
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| Device power supply | 230V AC (L + N) |
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| Dimmer feature | no |
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| Dry contact (voltage free) switching | no |
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| Ethernet (RJ-45) | no |
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| External switch supported | 2 switch inputs |
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| Google | Hardware > Power & Electrical Supplies > Electrical Switches > Specialty Electrical Switches & Relays |
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| History / Event log | yes |
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| Interlock mode | no |
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| LAN mode | depending on the hub/gateway |
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| Momentary switching (inching) | yes, auto on and auto off |
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| MQTT support | Zigbee2MQTT |
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| MSRP | 15.45 |
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| Notification functions | depending on the hub/gateway |
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| Operating humidity range | 5% – 95% RH |
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| Operating temperature range | -10°C – 40°C |
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| Output circuits / gangs | 2 |
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| Power consumption metering | no |
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| Power supply | AC |
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| Product category | relay switch module |
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| Rated current (output) | 10A / gang, in total: 16A |
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| Rated voltage (output) | 230V AC |
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| RF transmitter / receiver | no |
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| Schedulers, timers | yes |
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| Size | 44 x 38 x 16 mm |
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| Size 1 (cm) | 4,4 |
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| Size 2 (cm) | 3,8 |
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| Size 3 (cm) | 1,6 |
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| Smartphone app | depending on the hub/gateway |
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| Supported protocols | Zigbee |
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| Thread | no |
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| Type of the product | relay switch module |
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| Wi-Fi | no |
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| Zigbee | yes: Zigbee 3.0 |
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| Z-Wave | no |
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| Dimensions | 4,4 × 3,8 × 1,6 cm |
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