| 摘要 |
A security device includes a portable transmission unit that gives an instruction to start or stop security, a sensor that detects an abnormality of a tuner which receives a signal from the transmission unit and of an automobile, a sensor circuit having predetermined characteristics for discriminating the output of the sensor, and a security control section for causing a theft prevention device like a siren to be activated after output from the sensor circuit is received, wherein the characteristics of the sensor circuit can be set by the transmission unit. |
