IM160426002 - Inching /self-locking WiFi Wireless Switch 5V
Overview
There are two working modes for this module: inching mode and self-locking mode. Press the working mode button to switch between these two modes.
When your module is switched to inching mode, you can press on/off toggle button to turn on or off. There are two kinds of wiring way.
The first wiring way is to connect COM and NO with an appliance. In this way, when you press the button B or turn on on APP, connected appliance will be turned on for 1s and then auto turn off.
The second wiring way is to connect NC and COM with an appliance. In this way, when you press the button B or turn off on APP, connected appliance will be turned off for 1s and then auto turn on.
Please read more details about the product and order from https://www.itead.cc/smart-home/inching-self-locking-wifi-wireless-switch.html