Watch Session Guitarist Tim Pierce Record with the Kemper Profiler

anyone knows the green pedal on the left side in this video that keeps flashing red (1) and green (2-3-4)
is it a delay? metronome? never seen before...

Quote from kzngr

anyone knows the green pedal on the left side

Boss SL-20
https://www.boss.info/us/products/sl-20/

thanks

Cool thanks for sharing!!!