ReSound Standard Tube User Manual page 29

7 Special care should be exercised in selecting and fitting a hearing
instrument(s) whose maximum sound pressure level exceeds 132
dB SPL (with an IEC 60711:1981 occluded ear simulator), because
there may be a risk of impairing the remaining hearing of the hearing
instrument user.
8 External devices connected to the electrical input must be safe
according to the requirements of IEC 60601-1-1, IEC 60065, or
IEC 60950-1, as appropriate.
i
CAUTION
Only connect ReSound Danalogic hearing instruments to ReSound
Unite/GN Hearing accessories intended and qualified to be used with
ReSound Danalogic hearing instruments.
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