1. Default inching Function: Press the open relay by mobile phone, then cut off the pull-on immediately(default one second), it has the timing-share function at the same time.
2. 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.
Here is the reference about 5V DIY One Channel Jog Inching Self-locking Switch:
1 x 5V DIY Four Channel Jog Inching Self-locking WIFI Wireless Smart Home Switch
1 x Case