SportDog SD-425S Stubborn Dog Trainer With DRY TEK waterproof, 500 Yard Range SportDog SD-425S Stubborn Dog Trainer can alert with a stimulation, tone or vibration making it ideal for training, yard work or hunting. Features 7 instantly selectable static stimulation levels with medium/high stim ranges. Option to train with vibration and tone. Waterproof and submersible collar and transmitter for training in any environment. 500 yard range.