AntennaThis version has an external antenna ^^ GPSThis product is equipped with the L76K GPS module. ^^ Githubgithub. com/Xinyuan-LilyGO/T-Deck ^^ Product serviceIf you have any questions or suggestions about the product, please feel free to contact us. We will answer your question as soon as possible ^^ NoteThis device does not have a built-in battery meter, so the battery percentage display is inaccurate. This is not a product defect. Please refer to the internal blue light status for battery charging information.