Biofeedback and Laser for Allergies. Harriet Hall on November 18, 2008. ... The BAX3000 is a biofeedback machine, approved ONLY for biofeedback by the FDA. ... BAX 3000, biofeedback, David Tucker, electroacupuncture, Electroacupuncture of Voll, electrodiagnostic machines, laser acupuncture, lasers, quack devices, reporters;