A wireless power receiver receives, at a receiving coil, AC power fed from a feeding coil by wireless using a magnetic field resonance phenomenon between the feeding coil and receiving coil. An open portion that can expose an operation portion of the speaker is formed in one of the side surface portions, and an overhang portion that protrudes from the surface of the side surface portion is provided above the open portion. Such market-based mortgage loans can be pooled in a fund and fund shares can be issued against the fund. In another embodiment, the substrate is implanted, then flipped such that it can be and implanted on both sides before being annealed.