Thank you for viewing. Repels ticks and fleas with ultrasonic waves 【The Power of Ultrasound】 TICKLESS emits ultrasonic waves that are inaudible to humans, pets, and wild animals, preventing ticks and fleas from parasitizing. Eco-friendly, no chemicals or odors, and can be used by anyone. The frequency audible to humans is 20Hz~20KHz. Pets can hear ultrasound, but they cannot hear the 40 kHz frequency of TICKLESS. - Product Name: TICKLESS ULTRASONIC TICK AND FLEA REPELLER - Color: Pink - How to use: Simply attach to use - Effective duration: Approximately 9-12 months (Battery operated, built-in. Not replaceable) - Insect repellent effect: Flea and tick prevention