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There are three stage in the process. Firstly, the tracking device can be hidden in an appropriate place such as a bag or in clothing.The location of the device is sent by the message to a satellite monitor. Secondly, a transmission tower receives the message from the device. The tracking device is used to locate missing people, indicating the exact location and then re-transmitted to a mobile phone or lap-top. Finally, his or her location can also picked up on a mobile phone or lap top.The location site is shown as a text message on mobile phones or as a map on an Internet website. The device is able to provide details such as the name of that person or pinpoint a specific place on a map. This technology has been adopted by walkers and explorers, as it can immediately recognize where you are and lead to a better travel.