PUPUG 3G dongle Special For Android Car Stereo or Wince Car Dvd Player 3G Wireless USB Dongle 2G 3G Support TF Card Reader Adapter Internet Card Mini Smart Mobile USB Hotspot GSM Dongle Router Data Card with 2G&3G Modem Support SIM Slot 3G USB Modem, Plug and Play, no need install any software, compatible with all the operating system Internet connection sharing Work with external power supply, no limited working time; Special for EinCar customized Android car stereo. It is not suitable for universal wince car stereo. Please contact us before you buy it.