Dog Training Collar 800M Remote Transmitter for M880-1/M880-2/M880-3

It works like a charm i have a 75 pounds pitbull and he is really obedient .. and a good boy too but when off the leash he would of want to say to everyone and not everyone wanted to be great by a pitbull understandable !!! Installed this is my yard / front of the house and now he wont dare to go say hi to any one!!! One week of training with him also getting snap!! Lol grate product!!!