The Sonoff DualR3 is a dual relay Wi-Fi smart switch that can control two devices independently. It’s designed for various applications, including lights, appliances, and motorized facilities like curtains and blinds. DUALR3 is a flush-mounted Wi-Fi smart dual relay switch module that is installed behind any standard switch. Features: Dual Relay: Control two devices independently (control the lights via downstairs or upstairs switch) Power Metering: Monitor and save on electricity bills. Smart Control: Operate as a smart module for 100-240V AC motors. Multiple Modes: Includes switch mode, motor mode, and meter mode. (One of the typical features is roller shutter and window shades smart control in the motor mode.) Remote Control: Manage your devices remotely via the eWeLink app. Voice Control: Compatible with voice commands through Amazon Alexa and Google Assistant. Safety: TUV certified with protection against electric shock and overload protection. It’s a versatile device that can help automate your home or office for a more convenient and energy-efficient environment. Schedule to Open and Close your curtains for Comfortable Life Specifications: Power Supply: 100-240V AC Resistive Load: 3300W/15A/Total, 2200W/10A/Gang Motor Load: 10-240W/1A Max Power: 3300W (total) / 2200W (1 gang) Operating Temperature: -10ºC-40ºC Humidity: 5%-95%RH, Non-condensing Security Mechanism: WPA-PSK/WPA2-PSK Enclosure Material: PC V0