The TICKLESS device emits a series of ultrasonic pulses that are imperceptible to humans, pets or wildlife, but interfere with the ability of ticks and fleas to orient themselves. Ticks climb to the ends of grass, leaves or branches and attach to hosts that brush against them. When you walk in such areas, they sense your smell, the carbon dioxide you breathe out and your movement with their so-called Haller organ. TICKLESS’ ultrasound waves obstruct this organ so they won’t find you.