It can be used so that people of all ages will hear it. When it is set to 17KHz to the Mosquito will disperse these groups. When set to 8 KHz the Mosquito can only be heard by teenagers approximately 13 to 25 years of age.
Seems to me as though those two frequency listings were reversed....
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::