The device keeps ticks away without the use of harmful chemicals. Simply attach the device securely to your child's clothing, and it will repel ticks for 9-12 months after activation, allowing your family to enjoy nature worry-free. Tickless Baby is an ideal solution against ticks from the very first day your baby spends outdoors. The device emits a series of ultrasonic pulses at 40 kHz, which are inaudible to children and adults but disrupt the orientation of ticks, keeping them at bay. Range: approximately 1.5 meters. The device is primarily intended for preventive purposes.