portable duress sensor

In computer security, a sensor carried by an individual that is activated manually or automatically in an emergency or duress situation. The automatic action may be initiated by the sensor being in a horizontal position for more than a specified fine period. The sensor carries a radiofrequency or ultrasonic transmitter which signals a central alarmmonitoring station via a local receiver.; 在計算機安全學中,一種可由個人攜帶,且處于緊急狀態或被脅迫狀態下可以 手動或自動工作的探測器,自動操作可由將探測器水平放置一定時間來開始,探測器帶有 射頻和超聲波發射裝置,可通過接收端報告給中心報警監控總站。