number-of-knobs:21 ✕ headphone-sockets:2 ✕ microphone-inputs:1 ✕ has-loop-button-function:yes ✕ thickness:70-mm ✕

Allow OR queries (select multiple values per filter)

When disabled: selecting a filter value replaces the current value.
When enabled: you can select multiple values for the same filter (OR logic).