... 4. Mp3/4, radar detector GPS navigation system 1. GPS navigation system Technical Specifications:SystemCPUCPU : Media Tek MT3351,468MHZflash ... BLUECORE3Output power Class 2Transmission distance 10m(Max)Signal system NTSC/PALAudio playerMP3,WAV,MID,DAT,ASXVideo playerMP4, ... ,CVBSSupportE-book TXT, multi countries E-mapBatteryTypeRechargeable Li-ion battery,1000-1300MAWork time2-2.5 HoursCharge time2-3 ...