This rugged and reliable remote training unit is designed for the TC1 fence system from Border Control. Waterproof collar unit withstands anything Mother Nature dishes out. Features 50 stimulation intensity levels including momentary, nick and continuous. Choose from three types of stimulation, including positive vibration, jump stimulation, and rise stimulation. Training range up to two miles line-of-sight. GPS fence mode provides custom training radiuses from 15 yards to 800 yards. Warning zones are indicated with a vibration, beep, vibration/stimulation or beep/stimulation with delay. Up to five extra dogs can be added to a single system (each collar sold separately).