There are 3 products.
DUAL PURPOSE** 1 X 4AMP OR 4 X 1AMP 24VAC PSU WITH SP (4 AMP)
DUAL PURPOSE** 4 X 2AMP OR 2 X 4AMP 24VAC PSU WITH SP (8 AMP)
DUAL PURPOSE** 8X 1AMP OR 1 X 8AMP 24VAC PSU WITH SP (8 AMP)