Hello,
Is it possible to start the module by a pause and not by a pulse ?
I would like that as soon as the kit is powered, the pulse is triggered after a few seconds. Currently, at power up there is immediately a pulse that triggers. 
Thx
The VM136 uses a 555 IC
You may want to look at the VM188
You can download the users manual here
https://www.vellemanusa.com/support/downloads/?code=VM188