This is the Compustar FT-SHOCK dual stage adjustable shock sensor. It os the same type of sensor that comes with all Compustar security systems and is one of the best shock sensors available.
It has an adjustment wheel with numeric settings from 0 - 10, 0 being off and 10 being the most sensitive so it is extremely easy to set up.
It is designed to be mounted almost anywhere and comes with an included mounting strap or mounting bracket, your choice of mounting style.