MY MOTHER USE TO HAVE SUCH DEVICES FOR MICE WHICH WEREN'T EVEN EFFECTIVE. EVENTUALLY I UNPLUGGED THEM SUSPECTING THAT THOUGH WE CAN’T NOTICEABLY HEAR THEM THEY STILL HAD DAMAGING EFFECTS. THEN YEARS LATER WHILE AT AN AIR B & B I FOUND MYSELF HAVING HEADACHES IRRITATION & FATIGUE BUT ONLY WHILE INSIDE. I NOTICED THEY HAD THESE DEVICES AND UNPLUGGED THEM. IMMEDIATELY MY SYMPTOMS WENT AWAY. NOW I’M CONVINCED FROM FIRST HAND EXPERIENCE AND WANT TO HELP OTHERS BECOME AWARE
