A femtocell arrangement comprises a plurality of femtocells Femto 1 to Femto 13 having coverage distributed over a region, such as, for example, an office. The wireless keyboard includes a connecting module, a battery charge module, a detecting module and a solar charge module. When the name of the memory area which matches the received source information name of the source information to be searched is retrieved, the system acquires information which matches the received search target condition information from memory area information associated with the retrieved name of the memory area. The foundation is pivotably disposed on the base. The SiN layers are for increased isolation and are optional.