Barking is a natural behavior in dogs but unwarranted barking can quickly become problematic. The Zeus Ranger SC Anti-Bark Collar uses static correction, sound and vibration to help curb undesirable behaviors such as barking. The use of static correction is a safe and harmless approach to modifying negative behavior and, when activated, provides a slight tingling sensation intended to startle, but not hurt, your pet. With seven levels of static correction, vibration sensitivity, pet parents can select the apporpriate setting, beginning only with sound and slowly increasing vibration folloed by static correction.