This product is a wireless switch supports inching /self-locking mode. Users can add the device to the APP 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. 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. Note: 1. The WiFi module in this link is not support RF control , it only support WiFi control , if you need both WiFi & RF function , please find "WiFi & RF switch" product link in our shop , or contact seller for the right choice . 2.Please make sure to select the right model before buying,or leave us a message before shipping. Features: Option1.app DC7-32V USB5V Option2.app 5V USB5VThere are detailed instructions in the package With signal instruction light and relay pull-on instruction ligh Power < 1W, and quiescent current:80mA Cutover current< 10A , Cutover voltage< 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. Supported functions include Timing Schedules Device Sharing Group Management Works with Amazon Echo, Echo Dot, Amazon Tap Works with Google Home, Google Nest Works with IFTTT Note: we have change the WiFi module from PSA to PSF recently. PSF is more powerful.