Volume Pot, PCB Mounted Type 10K

            Potentiometer B10K10K Variable Resistor Schematic Symbol

Pot is short for potentiometer.  You will also see these called variable resistors.  The "CW" marking on the schematic symbol indicates the end of the resistance track which is closest to the end which the wiper moves to when the control is turned in the clockwise direction.  This is a linear type which you may see referred to as B10K.  An A10K type would have a logarithmic track which has more change in resistance towards the clockwise end to compensate for the characteristics of human hearing versus voltage signal level.  A B10K is good enough for this circuit.

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