Petsafe BDT-300 is a remote trainer that can be used to train your dog. It has a range of up to 400 yards and features 8 levels of correction, so you can customize the training to your dog's individual needs. The BDT-300 also has a built-in tone-only mode, which can be used to reinforce good behavior without delivering any correction.

To use the BDT-300, simply attach the collar to your dog's neck and turn on the transmitter. You can then use the transmitter to send a correction or tone signal to the collar. The BDT-300 is also waterproof and submersible, so you can use it to train your dog in any weather.