An apparatus includes a memory, a first processor, and a second processor, wherein the first processor is configured to retain first order data that indicate a first order of the plurality of devices, generate second order data that indicate a second order which is a portion of a first order, and decrease power consumption of the first processor after generate the second order data, the memory is configured to retain the second order data, the second processor is configured to detect a plurality of devices, determine whether or not a detection order of the plurality of devices corresponds with the second order, and output a correspondence signal in a case where the detection order corresponds with the second order, and the first processor is configured to increase the power consumption of the first processor based on the correspondence signal.