Device for hookingunhooking connectors of the LC type, comprising a slide SL which, in order to unhook the LC connector, is pushed from the front side and presses a retaining latch of the LC connector. In the field effect transistor, the n-type oxide semiconductor is formed of an n-type doped compound having a chemical composition of a crystal phase obtained by introducing at least one of a trivalent cation, a tetravalent cation, a pentavalent cation and a hexavalent cation. A signal received at the near end is reconstructed at the far end after being transmitted in an RF packet.