As we known, the GPS function is one of the main function on the aftermarket head unit, so we try to provide more useful information to instruct our clients to use this function and troubleshoot the GPS problem.Please notice, our unit does not support the TMC function, cause it need the built in TMC module, you could not use the TMC.The GPS navigation software, the GPS antenna, the GPS module are the three major factors which make the GPS function work as it's supposed to be.Our wince units are equipped with the Kudos maps, and the navi path have been set when the unit was tested by our quality inspector, so when you get units from us and install it into your car, you can use the GPS function just with pressing the Navi button and enter the GPS software.If you don't like the Kudos maps or want to use other maps, we can provide you another kind free maps provided by factory.Please notice, the wince unit does not support to download and install the third party navigation software.For the free maps provided by factory, you can write email to "support@autopumpkin.com" or directly contact our customer service staff to get it.You can download the map files, then insert the GPS card into the GPS slot and set the navi path.

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