Innotek’s exclusive Contain ‘N’ Train system keeps your dog in the safety of your yard and offers the control of a handheld transmitter for the same freedom away from home. This systems installs easily and with common household tools. Patented run-through prevention offers secure, reliable containment.Features: Hand-held transmitter with four stimulation levels and two separate tones one praise/one discipline 150-yard remote trainer range Water-resistant collar with user-replaceable batteries Can be expanded for yards up to 5 acres