Train your people to look at your phone. If the red light is on, on top of the phone, then you are on the phone. Some people will respond well given a treat, others will need a fist full of tough luv! Either way, they'll learn.
And oh yes, lke grider said, the Smith and Wesson will come with a light also. It's called a lazer sight. These are effective for the most stubborn intruders. Even they will respond to this light.
Good luck
