The Deluxe Big Dog Remote Trainer is designed for dogs over 40 pounds, stubborn or hard to train. 10 easily adjustable stimulation levels from 250 to 7000 volts ensures stern training to the most rebellious pet. Features include a tone-only option, which is much useful for correcting behaviors without static stimulation when training your dog. Receiver runs on two 3-volt CR2032 lithium batteries. Waterproof.