Overview: This product is a 4 channels universal WiFi wireless smart switch with RF 433MHz module, for your smart home system to remotely and automatically turn on/off home appliances and electronic devices by phone APP. It also can be controlled by RF remote controller indoors. It can connect and control four appliances on APP at the same time, and you can independently turn on/off each of the four gangs. It also supports timing turning on/off the appliances at a specified time, and share to others so that you can control your smart home together with your family. You can also voice control your home appliances by Amazon Alexa, and for Google Home/Nest, and enjoy intelligent life and make your home smarter. Features: *App Support: Free iOS and for Android mobile App eWeLink. *Sync Status: Real-time device status provided to App. *Remote ON/OFF: Turn 4 electrical devices on/off remotely from anywhere. *RF Remote control: Turn on/off by 433MHz RF Remote indoors. *3 Working Modes: Switch among interlock/self-locking/inching modes. *Independent control: Control each gang separately in APP eWeLink. *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. Specifications: Power Supply: DC/AC 7V-32V / USB5V or AC 85V~250V / USB 5V Max. Current: 10A/gang, 16A/Total Max. Power: 2000W/10A/gang, 3500W/16A/Total Operating Temperature(recommended): -20C-70C Operating Humidity: 5%-90%RH, Non-condensing Transmission mode: Wi-Fi communication,RF Remote Control Wireless Standard: 2.4GHz, 802.11 b/g/n Security Mechanism: WPA-PSK/WPA2-PSK Enclosure Material: Fire-retardant ABS V0 Gang: 4 or 1 Product Size: Approx. 112*83*26 (mm) Selling point: All receivers include a housing. Type 2 and Type 3 include 433MHz remote control (12V 27A battery is not included). Notes: There are four different types of receivers. Type 1: Voltage AC/DC 7V-32V It only supports Wifi function, not 433MHz. Type 2: Voltage AC/DC 7V-32V It supports Wifi + 433MHz Remote Control. Type 3: Voltage AC 85V-250V It supports Wifi + 433MHz Remote Control. Type 4: Voltage AC 85V-250V It supports Wifi + 433MHz Remote Control. Please select the type you need! 433MHz Remote Control: Operating voltage: DC12V (27A/12V Without battery) Transmitting frequency: 433MHz Encoding Type: Learning code Transmission distance : 10-100M (Open field) Free screwdriver