Symbol 5715 from IEC 60417 - Title/Meaning: Ultrasound receiver, overall gain Function/description: To identify the control or the indicator to vary the overall gain of the receiver.
Additional information: 
Published in: Amendment 2, 2002,3C/473/FDIS,62A/228/CDV
Own work using: iso.org/obp/graphics/grs/93b73fc8-a873-4300-831e-d431aa19c031 200.png
Vectorization:  Mrmw