A Word of Caution 

Persons fitted with pacemakers, defibrillators, implanted insulin pumps or other electro-medical devices should keep magnetic products at least 18" (45cm) away from the device.  Keep away from audio/video tapes, credit cards and computer discs.  Pregnant women should consult their health care provider before using magnetic therapy products.  The World Health Organization agrees that the gauss strength and types of magnets used in magnetic therapy products offers no health hazards.  If unsure, please consult your health care provider before use.