The SportDOG Brand Sport Trainer 575 is designed for field training and hunting with close-working dogs. Featuring an easy-to-read OLED screen, you can view the selected dog, static stimulation level, and battery status with just a glance. This, combined with large Dog 1 / Dog 2 buttons to easily toggle between dogs, makes the SD-575E especially suited for multi-dog hunting situations. The remote trainer can be expanded to control up to 2 dogs with a SportDOG Add‑A‑Dog Collar Receiver. 10 levels of both continuous and momentary static stimulation, as well as vibration and tone options, allow you to customize this system to fit any situation or dog's temperament.