Vh20 hit the basics.
range is clear line of sight and tells you how powerful the transmitter is. That is not an indication of how strong the shock will be. Collar has it's own battery with reciever that will give the shock. To get through trees and over hills you need a good collar. 100 yards won't even reach the end of my back yard. The collar i use is 1.5 miles.
Bogey could give insight into security dogs. Mine is with field/hunting dogs.
You can not buy the collar and the puppy on the same day. I would say you have to work withbthe dog for awhile first. I would say a few months. Each dog will be different.
You want to make sure the dog knows the command. You can't get a 3 month old pup, slap a collar on it, say "sit" and shock the shit out of it. You have to teach it "sit". Shock collar is a "reinforcement" tool.
It is used when the dog knows what you want but is focused on something besides you.
I like one with, tone,tick, zap. Say a comand, if followed then prasie is given. If not tone. Repeat command if not followed then tick. Repeat for zap (the collars have a limit on how long and how often) i think mine is a max of 7 sec with a 30 sec pause if the 7 sec are reached.
Train first. If you decided on a new command it must be taught first.