The transmitter will track the distance of your dog by sending repeated signals to the receiver device that is attached to the dog’s collar.
When the collar receives the signal transmitted, it will figure that the collar is still within the safe zone and no correction will be sent off.
If for some reason the collar stops receiving signal (e.g collar goes out of boundary, signal blocked by obstacle, or the transmitter runs out of battery), the collar will figure that it is no longer in the safe zone and corrections will be sent off.
It will first send a beep, vibrate and lastly shock. The collar sends a 1.5ma shock which has been tested and proven to be safe for dogs or other pets shock. If your dog is stubborn or hard of hearing then a shock will make sure they stop running and come back to the zone.