Dogtra Super X 1 Dog Training Collar: * Designed for extreme training conditions * Professional grade, long range e-collar * Excellent durability and dependability * Rheostat intensity dial * Allows for gradual adjustment in stimulation intensity * Full 1-mile range * Stimulation types: nick, constant and non-electrical stimulating pager/vibration * "Regular" and "Mild" stimulation adjustment for highly sensitive dogs * Rechargeable, 2-hour rapid charge Lithium Polymer battery * Illuminated LCD screen displays exact level of stimulation * Tri-color LED battery life indicator * LED color indicator to show remaining battery life * Fully waterproof collar/receiver and transmitter * No external antenna on the collar/receiver * 1 charger: transmitter and receiver can be charged at the same time * Over 8,000 different identity codes * Prevents signal match-up with other e-collars * Model# 3500NCP