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2. Motion detector - Wikipedia

   en.wikipedia.org/wiki/Motion_detector

   A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.

3. Nana technology - Wikipedia

   en.wikipedia.org/wiki/Nana_technology

   Jitterbug Cell Phone Designed with simple to see and use features, including oversized buttons, increased screen size and brightness, and a cushioned ear rest. GrandCare Systems A sensor based system the remotely monitors motion and related activity in the home, providing alerts for activity detected as unusual or dangerous. The system ...

4. Security alarm - Wikipedia

   en.wikipedia.org/wiki/Security_alarm

   The systems are designed to detect and analyze incoming electronic signals received from the sensor cable, and then to generate alarms from signals which exceed pre-set conditions. The systems have adjustable electronics to permit installers to change the sensitivity of the alarm detectors to the suit specific environmental conditions.

5. Stingray phone tracker - Wikipedia

   en.wikipedia.org/wiki/Stingray_phone_tracker

   When the signal strength is determined from enough locations, the computer system centralizes the phone and is able to find it. Cell phones are programmed to constantly search for the strongest signal emitted from cell phone towers in the area. Over the course of the day, most cell phones connect and reconnect to multiple towers in an attempt ...

6. Emergency test alert is set to ping cell phones nationwide ...

   www.aol.com/news/emergency-test-alert-set-ping...

   San Luis Obispo County residents will receive the test alert at 11:20 a.m. Cell phone users can activate test alerts and customize their alert settings in the system preferences of their device ...

7. Wireless Emergency Alerts - Wikipedia

   en.wikipedia.org/wiki/Wireless_Emergency_Alerts

   An example of a Wireless Emergency Alert on an Android smartphone, indicating a Tornado Warning in the covered area. Wireless Emergency Alerts (WEA), formerly known as the Commercial Mobile Alert System (CMAS) and, prior to that, as the Personal Localized Alerting Network (PLAN), [1] is an alerting network in the United States designed to disseminate emergency alerts to cell phones using Cell ...