Information of the flow of contract information and the flow of payment is acquired from the worldwide-known trade finance EDI service in cooperation therewith. Each of the first and second gallium nitride high electron mobility transistors includes a respective source, drain and gate terminal. The housing includes a restricting rib for restricting a displacement of the flexible locking portion. The solar panel is disposed between the photosensitive element and the lens module, and the solar panel is electrically connected with the battery pack. In some embodiments, a unit is issued to a holder including a forward contract and a note, in which the note specifies an initial capped remarketing, at least a first subsequent capped remarketing, and an uncapped remarketing, the uncapped remarketing performed only if each of the capped remarketings fail.