By always having repeated agression’s nightmares , I installed a Cerbere33 under my bed I felt immediate amelioration for several month .Recently my nightmares reappeared . Distraught , I contacted the company that had installed the Cerbere33 for me , someone from the company advised me to check if the device had not been moved and stood headed north . Indeed, the device was moved inadvertently by the housekeeper and was badly positioned . After replacement , I finally had my refreshing and serene nights back. Thank you.