Fool-type wifi control module, no need to , only need to download an APP, link WIFI to control the built-in cloud. As long as the module is connected to WIFI, the mobile phone can be controlled anywhere in the country. Default inching function: press the phone to open the relay, immediately disconnect the pull (default 1 second), and has a time-sharing function When the light is on, press the jog lock button to self-lock. Press the open relay to pull in, press the relay to cut off. Working mode: This product is a wireless switch supports momentary(inching) /self-locking/interlock work modes. Users can add the device to the APP eWeLink in order to remotely control connected or power circuits. Note:The relays are switches without output, the power supply input (AC/DC) just for the PCBA.Tap the work mode setting button manually, the product can change the working mode. When in inching mode, you can have two wiring ways to select: -Turn on 1s and then auto-off -Turn off 1s and then auto-on. When in self-locking mode, you can remotely turn on/off connected devices immediately. When in interlock mode(only 2- and 4- supports), you can remote control AC/DC motors. The product enables remote control of through the mobile application eWeLink, available on both Android and for iOS. Working voltage: USB 5V/DC7-48V With signal indicator light and relay pull-in indicator light Power: Less than 1W Quiescent current: 80mA Maximum current: Less than 10A Maximum voltage: Less than 250 10A relay mode The life of the relay model has exceeded 100,000 Insulation resistance: 100 Maximum pulling time: 15m Maximum release time: 5m Working temperature: -40~70 Working humidity: 40%~80%RH type: Smart Wifi Switch color:Green+black+blue Material:PCB+electronic components Package Contents: 1 x Smart Wifi Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.