SONOFF DUALR3 takes your home to the next level. DUALR3 is a flush-mounted Wi-Fi smart dual relay switch module that is installed behind any standard switch to transfer it into a smart switch for wireless remote control with mobile devices or voice command. Unifying your home appliances into an integrated wireless network to make them communicate with one another which is convenient for you to manage and control, including lights, like roller shutters, window shades, blinds, awning, etc. Three working modes available. DUALR3 comes with switch mode, motor mode and meter mode. One of the typical features is roller shutter and window shades smart control in the motor mode. The switch module offers the ultimate flexibility for your roller shutter and window shades by app remote control and scheduling timed events no matter whether you are home or away. Double two-way control. The double relay switch module distributes the load to two inputs compared to the simple relay, which this working mechanism lets you have two-way control for two devices independently. DIY Your Automated Motorized Facilities: DualR3 can operate as a smart control module for 100-240V AC motor. Like tubular motor for bi-directional motorized curtain, blinds,roller shutter, awning, ect. Note: DUALR3 is applicable to four wires(GND, neutral, Forward, and Reverse) AC motors, like tubular motors. Creating an Astomsphere, Actually Simple: DUALR3 works with other SONOFF products like L1. Just tell Siri and it wil automatically close the curtain for you to create a romantic atomosphere. Note: Siri voice control is a shortcut of Siri in eWelink, DUALR3 does not support Homekit temporarily. Power Supply: 100-240V AC Max Current: 15A(total),10A(1 gang) Max Power: 3300W(total) / 2200W(1 gang) Frequency: 802.11 b/g/n Security Mechanism: WPA-PSK/WPA2-PSK Humidity: 5%-95%RH, Non-condensing Operating Temperature: -10-40 Gang: 2 colour: white Material: ABS Size: 54x49x24mm Package Contents: 1 x DualR3 Smart Wifi Switch Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.