Boss FV-50H volume pedal here.
The TRS allows this to be used as an expression pedal in some applications.
info here: Strymon Tech Corner #3 – Volume Pedal as an Expression Pedal - Strymon
Link to pedal manual: http://cdn.roland.com/assets/media/pdf/FV-50H_OM.pdf
$52 or best cash offer paypaled and shipped USPS.
The TRS allows this to be used as an expression pedal in some applications.
info here: Strymon Tech Corner #3 – Volume Pedal as an Expression Pedal - Strymon
Link to pedal manual: http://cdn.roland.com/assets/media/pdf/FV-50H_OM.pdf
$52 or best cash offer paypaled and shipped USPS.