| 摘要 |
PROBLEM TO BE SOLVED: To provide a smart phone case which can change a transmission state and a reception state with satisfactory operability, when making a smart phone function as a transceiver which is operated using a half-duplex communication method.SOLUTION: A smart phone case 201 is used by attached to a smart phone 100 which is configured to transmit and receive data using a full-duplex transmission method. During the execution of an application (transceiver application AP 1) which operates the smart phone 100 by the half-duplex communication method, a transmission/reception changeover switch 20 selectively changes the smart phone 100 between the transmission state and the reception state. A communication unit 21, which is a signal output unit, outputs a signal from the transmission/reception changeover switch 20 to the smart phone 100. |
