Paxar Gold 6037EX - Manual (Page 180)

6-6 Programmer’s Manual
A u d i o / V i s u a l F e e d b a c k
It is recommended that in the application, you include some sort
of audio or visual feedback indicating that the trigger has been
pulled.
For example, after a trigger pull, the application may have the
printer beep. Without such feedback, most users keep pulling,
not realizing the pull has registered.