The Fox's iTrail PRo is a passive GPS logger than you can bring anywhere, anytime. Measuring 1.5” x 1.5”, this logger records location, speed, time and displays the information on an easy-to-use interface powered by Google Maps and Google Earth. It has extra 90 hours of drive time using the extended battery pack. It also comes with a weather proof magnetic case which holds the extended battery and the iTrail® GPS logger all in one covert case.