App Support: Free iOS and for Android mobile App eWeLink; Independent control: Control each gang separately in APP eWeLink Sync Status: Real-time device status provided to App ; Remote ON/OFF: Turn 4 electrical devices on/off remotely from anywhere 3 Working Modes: Switch among interlock/self-locking/inching modes Supports remotely turn on or off connected appliances, for example light, electric kettle, electric rice cooker, electric curtain, etc Timing: Supports 8 enabled countdown/single/repeat timing tasks to turn on/off at specified time DIN Rail Mounted: Great for industrial control Voice Control: Compatible perfectly with Amazon Alexa, for Google Home, for Google Nest,IFTTT; Share Control: Control your smart home together with your family Operating Temperature(recommended): -20-70CelsiusOperating Humidity: 5%-90%RH, Non-condensingWireless Standard: 2 4GHz, 802 11 b/g/nSecurity Mechanism: WPA-PSK/WPA2-PSKProduct Size: Approx 112 x 83 x 26 (mm)Power Supply: 7V-32Vcolour:WhiteMaterial:plasticPackage Contents:1 x 4CH Smart Wifi SwitchOnly 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