The Dogtra Super X2 Dog Training Collar has an exceptional 1-mile range and is specially designed for extreme training conditions. With excellent durability and dependability, this Dogtra Dog Training Collar is 100% waterproof and works in all weather conditions. This Dogtra Training Collar has 127 levels of momentary and continuous stimulation, as well as a non-stimulation pager/vibration feature. The rheostat dial on the Dogtra Dog Training Collar allows for gradual adjustment of stimulation. With a mode for "mild" stimulation, the Dogtra Super X2 Dog Training Collar can even be used on highly sensitive dogs. The transmitter has an LCD window that displays the intensity level. The three-bar battery life indicator also lets you know how much battery power you have available. The receiver on the Dogtra Dog Training Collar comes with antimicrobial plastic casing and surgical steel contact points to reduce the possibility of the collar irritating your dog"s skin. The Dogtra Super X2 Dog Training Collar includes two receivers, one transmitter and a battery charger. Dogtra Super X 2 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 * Includes 2 collars/receivers * Model# 3502NCP