is-a-flatbed-scanner:yes ✕ bit-depth-grayscale:8-bit ✕ simplex-scanning-speed-grayscale:7-ppm ✕ usb-version:2 ✕

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).