Features: Sirf star iii gps chip set,20 paralled satellite-tracking channels for fast acquisition and reacquisition. Integrated gps flip-up antenna, ultra thin and compact case, does not take too much space in your car. Touch pad screen makes it very convenient for configuring and operating the device while driving. 4.2 tft lcd screen, perfect for reading. Most advanced mp3 function for audio. Mpeg4 movie player Independent audio volume adjustment (vr) function. With sd/mmc interface to provide user to download map from computer easily elegant, stylish design, free-adjustable car holder suitable for all models of vehicles. Rechargeable lithium-polymer battery.