E- COLLAR TECHNOLOGIES ET-300 MINI- EDUCATOR E-COLLAR 1/2 MILE ELECTRONIC REMOTE DOG TRAINING COLLAR. The Mini ET-300 one dog system with 1/2 mile range, small receiver for dogs 5 pounds and larger. Includes 1 Biothane dog collar (3/4″ wide x 30″ long), 1 RX-090 mini receiver 2″ long x 1.5″ wide x 1 high, 2.4 oz. And 1 Mini ergonomic “stopwatch” transmitter (2.6″ diameter x 1.1″ thick x 4.5 high) well-suited for small hands or in situations where discretion is important. Delivers a tapping sensation similar to vibration, but moreRead More