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Sonoff - Smart Mini R2 (Zigbee) is a compact in-wall smart switch relay designed for retrofit installation behind existing wall switches. With Zigbee connectivity and no neutral wire requirement, it transforms your traditional switches into smart switches without visible modifications. Supports 2-way switch wiring for flexible installation. Key Features Zigbee Smart Control: Low-power Zigbee connectivity for reliable smart home integration with compatible gateways. In-Wall Retrofit: Compact design fits behind existing wall switches — no visible changes to your switch plates. No Neutral Wire Required: Works with existing wiring without a neutral connection for easy retrofit. 2-Way Switch Support: Supports 2-way switch wiring for flexible multi-location control. Hub Required: Requires a Zigbee gateway (compatible with Tuya and eWeLink Zigbee gateways). High Load Capacity: Supports loads up to 6A / 1380W. Specifications Protocol: Zigbee Neutral Wire: Not required Hub Required: Yes (Zigbee gateway) Max Load: 6A / 1380W Installation: In-wall retrofit 2-Way Switch: Supported Brand: Sonoff Model: ZBMINIR2 Note: A Zigbee gateway is required for smart control. The switch can be operated manually without a gateway.