This product is a wireless switch supports inching /self-locking mode. Users can add the device to the APP Ewelink in order to remotely control connected home appliances or devices. In self-locking mode, customers can remotely turn on/off connected devices immediately. When in inching mode, customers can have two wiring ways to select, Turn on 1s and then auto-off, Turn off 1s and then auto-on. and you can set the inching time in APP . The product enables remote control of home appliances through the mobile application eWeLink, available on both Android and iOS. WIFi control model, no need to program. No matter where you are, you only need to download a APP to connect the wifi and control the cloud Specifications: Input voltage: AC 85-250V, Micro-USB 5V input. Output: Signal output only, no voltage output. Max current: 2200W/10A. WiFi standard: WiFi 2.4 ghz b/n/g. Power Less than 1W, and quiescent current:80mA Cutover current Less than 10A , Cutover voltage Less than 250 10A Relay Mode The life of Relay Model is more than 1,000,00 Insulation resistance: 100 Maximum pull-on time: 15m Maximum release time: 5m Working Temperature: -40 to 70degre Working Humidity: 40% to 80% RH Default inching Function: Press the open relay by mobile phone, then cut off the pull-on imediately(default one second), it has the timing-share function at the same time. Self-locking when press the inching and locking button with the light on. Press open relay to pull-on, press close relay to cut off. There are differences in printing and silk-screen printing due to different batches, which will not affect the use; there are color differences in the actual product due to different light or display. Color: green Material: PCB Package Contents: 1 x 4CH Smart Switch Module 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.