| 摘要 |
PURPOSE:To realize the portable radio equipment which copes flexibly with various services. CONSTITUTION:An expansion unit 3 consists of an external circuit 3a, an operation button 31 connecting to the external circuit 3a, plural operation display sheets 33, and a coupling means 30 coupling the external circuit 3a and the main body circuit electrically. Then a mount means able to attach/detach the expansion unit 3 to/from the device main body 1 optionally is provided and the main body circuit and the external circuit 3a are connected by coupling means 30, 18 when the expansion unit 3 is fitted. |
