LG Pra.L Series Owner's Manual page 12

12 Safety Information
y Pregnancy,
menstruation,
lactating women are
not recommended
for use. (Unstable
hormonal balance
may cause temporary
skin trouble.)
y Do not allow people
to use who can not
clearly express their
own will, including
infants.
y Do not use the
device if you have an
abnormality in the
sensory system.