Expanded to control up to 3 dogs. New sleeker antenna design improving transmitter look. ½ mile range. Multiple stimulation ranges (low/medium). Tone and Vibration options. 7 instantly selectable stimulation levels. 16 levels of Continuous Stimulation. 8 levels of Momentary Stimulation. 100 % waterproof & submersible collar & transmitter (up to 25 ft.). No external collar antenna. Push-button ON/OFF switch activated at the collar. Choose from 7 pre-set modes. Change stimulation intensity from the transmitter. Tone or vibration button. Built in toggle switch upgrades to a 2 and 3 dog unit. Rechargeable, Li Ion batteries. Two hour charge. SportDOG Two Year Warranty