... Operating system Built in GPS antenna and it also can connect external antenna Functions: Navigation, MP3, MP4, JPG picture,E-Book etc.. Built_in ... , Support WAV, MPEG,MPG,ASX,DAT,ASF,WMA,MP3 andWAV Battery: with 1000mAH~1300 mAh built-in Lithium battery DC IN: 5V AC-127C 4.3 inch TFT touch screen GPS