The H20 1832 features nick and constant stimulation,"Jump" feature automatically boost intenstity levels along and "Rise" feature that gradually increases stimulation until you get a response from your dog. Waterproof transmitter and receiver. One-mile range with the antenna woven into the collar strap. Collars have 16 levels of stimulation adjusted from the transmitter. Transmitters and receivers have rechargeable ni-mh batteries. Charger included. Two dog model.