Arpalit electronic flea and tick repellent is suitable for dogs and cats of all sizes and ages. It can also be used for older and weak animals, during lactation, for young animals, and for animals living indoors. The electronic repellent contains a microchip that emits ultrasonic pulses at a frequency of 40 kHz, which is inaudible to humans and animals. Short ultrasonic pulses disturb and repel parasites within a radius of 3 m from the animal, thus preventing infestation.