A main chain-type or side chain-type polymeric compound having a structure wherein at least one metal complex segment having a plurality ligands is introduced into a main chain or a side chain is provided. Each modulator is associated with its own wavelength. When prices change for constituents of such a mutual fund, the fund typically needs to rebalance in order to maintain a desired composition. The frame includes a series of tubes connected end-to-end by locking pins, making it very easy to assemble and disassemble the tree pusher. The output voltage is adjustable only when the controller receives an output voltage as a feedback from the feedback device.