GPS-Tracker for car or RV. Get alarm on movement. Audio Surveillance included. Track your car or RV by GPS with "Car Security Control". Use an old or cheap smartphone as a sensor in your car and monitor it from the Android in your pocket. Devices communicate by SMS ... so the Sensor-Phone needs no internet and can be run even with a cheap prepaid SIM card. Get an alarm if the car gets moved. Use the Car Audio Surveillance to monitor suspicious noises.