Dogtra 3502 NCP Training CollarThe 3500 NCP is called Super X because it has extraordinary features, including its a exceptional range, and it can be used in extreme training situations. The model has a range of 1,600 meters, the transmitter and the receiver are waterproof; it also has 127 levels of stimulation in "Nick" and in "Continuous" and a "Vibration" function. You can choose between the functions "Normal" and "Moderate" according to the sensitivity of your dog. Features An