An e-collar designed for training small dogs. It uses a low to medium power that has precise stimulation level (0-100) and has a 400 yard range .It has Nick and Constant for stimulation with a non-stimulation pager. This unit comes with a waterproof receiver and a water-resistant transmitter, plus a reduced receiver/collar designed for dogs as small as 10 pounds. This unit can train up to two dogs by purchasing another collar.