E-Collar ET-300 Mini Educator Remote Dog Trainer 1/2 MileDescription E Collar ET 300 Mini Educator 1 2 Mile Remote Dog Trainer Collar The Most Human & Effective Dog Training Collar on the Market The E Collar ET 300 Mini Educator is a 1 Dog, 1 2 mile range collar trainer packed with unique features and employs a proprietary "blunt" stimulation and is the most effective and humane dog collar trainer available. The small transmitter is easy to hold, store or carry and great for situations when discreetness is