The Educator EZ-903 Three Dog Easy 1/2 Mile E-Collar Remote Dog Training Collar with Vibration Sensation and Pavlovian Stimulation is a high-quality and effective training aid for dogs. This waterproof collar has a range of 1/2 mile and is suitable for dogs weighing 5 lbs. and up. It features an adjustable stimulation level from 0-100, with maximum stimulation and lock-and-set features for safety. The collar also offers 7 vibration settings, 4 tone settings, and utilizes COS technology for clean stimulation. With a boost feature for increased stimulation and a tapping sensation for additional stimulation, this collar provides a customizable training experience. The patented Instant Stimulation Mode eliminates surprise shocks, ensuring a humane training process.