DT Systems 1 Dog SPT 2420 Stimulation Collar The spt 2420 features momentary (nick) stimulation, continuous stimulation, jump stimulation (patent pending), rise stimulation (patent pending) and positive vibration Lightweight, compact completely waterproof collars and transmitters with maxx-range internal collar antenna system One touch digital controls with lcd display on transmitter, 50 adjustable intensity levels displayed on the transmitter Dt systems' exclusive positive vibration feature ahs taken the dog training industry by storm, offering a positive and humane alternative to electronic stimulation. Up to 2400 yard range Completely waterproof collar and transmitter Transmitter has an easy to read LCD screen Features positive vibration, jump and rise stimulation