This item has been proven safe, comfortable, and effective for all pets over 15 lbs. It assists you in controlling your pet without a leash in a range up to 330 Yards. At the push of a button, the remote transmitter sends a signal, activating the collar-receiver. Using the remote trainer consistently and correctly, most misbehaviors that your pet exhibits can be corrected or any basic obedience commands taught. It can also be used to deter such unwanted behaviors as jumping up, digging and chasing.