By attaching this easy-to-use, tiny device to your cat or dog's collar, parasites can be kept at bay for up to 9-12 months after activation, allowing you and your pet to enjoy nature worry-free. The device emits ultrasonic pulses that are inaudible to humans and pets but disrupt the parasites' ability to navigate, keeping them away from your pet. It is environmentally friendly, contains no chemicals or fragrances, and can be used with the utmost safety even on younger, older, sick, or pregnant pets. The range is approximately 1.5 meters. The device is primarily intended for preventive purposes.