AVTTO WSM16 4-Gang Smart WiFi Switch APP Voice Control Dual Way Controller DIY Light Switch Module ?APP Remote Control: Control the light switch anywhere/anytime via phone APP ?Voice Control: A simple command to achieve voice control ?Timing Function: DIY your daily life as you like ?Easy to Install: Mini size and easy to install in switch installation box or on the lamp ?Dual Way Control: Upgrade 2-way control switch without changing the wiring design of the house ?Family Share Function: Create a smart home together with your family member Specification: ?Product Type: 4 Gang WIFI Switch Module ?Voltage: AC100-240V 50/60Hz ?Maximum load: LED 250W 10A ?Operating Frequency: 2.412GHz-2.484GHz ?Working temperature: -10?? to +40?? ?Protocol: Wireless IEEE 802.11b/g/n ?Operating range: