The tried and true Dogtra Professional-Grade High-Output 2-Dog Expandable Remote Training E-Collar is the multi-purpose e-collar built for all walks of dog training and a favorite among the police K-9 crowd. The Dogtra 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 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 expandable e-collar the perfect training gear for mild or stubborn dogs. This collar is fully waterproof for long-lasting use.

• 3/4-mile range
• Fully waterproof E-collar training system
• High output receiver
• 127 stimulation levels/Rheostat Dial/LCD screen
• Nick/constant stimulation and pager vibration
• 5/8 in. contact points
• Performance receiver design
• E-collar dog training system for dogs as small as 35 lb.
• 2-hour rapid-charge batteries
• Electric training collar is expandable to a 2-dog system