This controller is being sold AS IS for parts or repair.
It was installed on an Arid Dry MS-2400/2000 dehumidifier, and when it was installed it would turn on and off randomly.
We thought it might be a loose connection, but we could not find one.
It requires 24V AC or 28 to 36V DC input to operate, with a maximum power of 45 VA / 30 W.