No matter how many hours you spend in the hunting stand, Tickless protects you from ticks for up to 3,000 hours. Simply attach the device securely to your clothing, and it will continue to keep all ticks away without the use of chemicals and without emitting noise or odor. The Tickless device emits ultrasonic pulses that are inaudible to humans, dogs, or wildlife, but disrupt the parasites' ability to navigate. It is environmentally friendly, contains no chemicals or fragrances, and thus provides safe use for everyone. The Tickless technology has undergone rigorous testing and has passed.