E-Collar ET-400 Educator 3/4 Mile Remote Dog TrainerThe ET 400 Educator is a 3 4 mile remote trainer that employs our proprietary blunt stimulation making it the most humane and effective dog training collar available. Loaded with unique features, including lock and set stimulation levels from 1 to 100, and the ability to set a boost level from 1 to 60, the Educator allows the user to tailor the stimulation to your dogs temperament. The small 2. 4 ounce receiver provides plenty of stimulation for most