PetSafe Yard-and-Park Remote&nbsp;Trainer, PDT00-10603 Remotepet trainer for long-range control over dog Waterproof receiver and transmitter for reliable use in inclement weather, waterfowl hunting 400-yard range for canine control while hunting, hiking, running, and more 8 levels of electric stimulation; positive and negative tone buttons for training and basic communication Expandable to 3 dogs with the Petsafe Add-A-Dog receivers; rechargeable Ni-MH batteries included