... 6.0 Operating system Built in GPS antenna and it also can connect external antenna Functions: Navigation, MP3, MP4, JPG picture,E ... 6.0 Operating system Built in GPS antenna and it also can connect external antenna Functions: Navigation, MP3, MP4, JPG picture,E ... ,ASF,WMA,MP3 andWAV Battery: with 1000mAH~1300 mAh built-in Lithium battery DC IN: 5V AC-125T 3.5 inch best seller GPS tracker