GPS tracker is a personal remote positioning device with built-in GPS and GSM/GPRS technology in compact size. It can transmit the longitude and latitude coordinates to your cell phone by the SMS. By this, you can find its location on the Google maps© or other map software. The tracker can also upload positioning data through GPRS to a designated server. The user can look for real-time location-tracking, historical trajectory through the Internet. These features are for protecting and searching children and elders. Furthermore, it can be used for other security purposes such as asset protection and animal tracking.