I'm also interested in this.
Not fussed about the size as long as it is light (did just say that?) and can be accommodated on the rifle (Umarex 850) as I can't be bothered with cables to belt packs etc.
I understand about advertising specific wares and all, but I just want to know what works.
I have some pennies, but want to keep it realistic.
I'm also curious about the how to, too.
Quick flick at low beam (max 70 yards) to clock the eyes, move in, quick low beam to spot, then dazzle the varmint and POP!
Easy the type, harder in practice.