The tried and true Dogtra 2300NCP Expandable e-collar is the multipurpose e-collar built for all walks of dog training and a favorite among the police K-9 crowd. The Dogtra 2300NCP Expandable is designed for advanced level pet training, competition training, police K-9 work, or any types of hunting, where a high output 3/4-mile range unit is needed. 

The 2300NCP Expandable e-collar comes with a durable receiver that outputs low-high stimulation from 0-127 levels for precise and gradual control, using a patented Rheostat Dial with LCD display on the handheld transmitter. The 2-dog expandability and intuitively placed buttons for Nick and Constant stimulation and Pager vibration lets you simultaneously control up to 2 dogs in training, making the 2300NCP Expandable the perfect training gear for mild or stubborn dogs.