Symbol 3674 from ISO 7000 - Title/Meaning: Transmission sensitivity, setting, low 
Function/description: To identify the control that activates the low sensitivity setting for the transmission. To indicate that the transmission sensitivity is set to low sensitivity.
Own work using: iso.org/obp/graphics/grs/c1a0011f-74ac-49ed-90cd-1009e636ffb7 200.png
Vectorization:  Mrmw