Welch Allyn Audioscope 3 Portable Screening Audiometer - User Manual - Manual (Page 24)

TRANSFORMERS (CHARGING)
Any of the following Welch Allyn charging transformers may be
used with this instrument:
No. 71040 110-130v Input UL
Recognized. CSA Certified
No. 71032 220-240v Input
Compliant with IEC 601-1
No. 71034 230-250v Input
Compliant with IEC 601-1
No. 71036 230-250v Input SAA
Approved
All transformers operate at either 50 or 60 Hz.
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