First, welcome to the forum- when you get a minute, stop by the intro section, and say howdy.
Not sure exactly what you have- the 17T that I know of has a BLUE handle, and is intended to shoot the Simuntion training round. Click HERE:Glock*Glock Model 17T Simunitions Training Pistol : Neve's Uniforms & Equipment
Possible you may have a laser variant- targets (or opponents) wear laser receptors, score hits (much like the military MILES system.)
These are for sale to Law Enforcement Agencies ONLY- so I have to ask- are you comfortable with the party you got this from?