Used in a non-smoking environment, operation confirmed. After purchasing new, I checked the sound output, and it was different from what I expected, so I'm selling it. No price reduction. NCNR (No Claims, No Returns) The following is a quote: The LEVEL SET BUFFER is a buffer pedal for using multiple guitars without damaging the tone. You can control the signal with the three controls: LEVEL, HI-FREQ, and LOAD. The MUTE switch, which mutes the signal, is useful for muting the output during tuning. It also has a tuner output to keep the tuner running at all times without interfering with the signal.