The ET-300 Mini Educator 1/2 mile remote trainer employs our proprietary "blunt" stimulation for humane and effective remote dog training. 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 ET300 Collar allows the user to tailor the stimulation to their dog's temperament. The smaller transmitter is especially well-suited for smaller hands or situations where discreetness is important. The small 2.4-ounce receiver provides plenty of stimulation for large and small dogs. The night tracking light can be set to flashing or solid which is especially convenient when using it in a 2-dog system. Proudly assembled in the USA.