Dogtra Edge Dog Training Collar -
System has a one-mile range, with nick and constant stimulation modes, and is expandable up to four dogs. Choose between the interchangeable rheostat intensity dial or selector step dial stimulation. LCD shows exact level of stimulation. Fully waterproof transmitter and receiver/collar. Built-in high-intensity LED lights on collar. Includes interchangeable contact points. Two-hour rapid-charge lithium polymer batteries (included). Includes carrying case.