There are two ways to set a boundary level on your PetSafe wireless invisible pet fence.
One of these methods involves 2 people for the set-up and one method only requires 1 person.
2 Person Method
One person will begin standing outside, at the edge of where the intended boundary is.
They will hold the receiver collar at pet height while the other person is inside, at the transmitter.  The person using the transmitter will begin with the boundary level at the maximum setting. They can then slowly decrease the boundary size until the person holding the pet collar hears a warning beep.
This beep indicates that the collar is near the boundary, and this is the boundary setting that your transmitter needs to be on.
1 Person Method
Check the range level chart on the back of your manual to estimate the boundary setting you will need for your area.
Set your transmitter to this level and then go to the boundary you would like to have for your pet. Next, take the collar out, holding it at pet height. If you hear a warning beep before you get to the boundary you desire, move the setting to a higher level. If you do not hear a warning beep, drop the boundary level lower.
Continue to repeat this process until you find the boundary setting that you like.