VersionThere are two versions of T-Deck-Pro, one with audio module PCM5102A and the other with 4G module A7682E. AntennaThis version has a built-in antenna. Firmware Meshtastic and LILYGO firmware are available for selection. Githubgithub. com/Xinyuan-LilyGO/T-Deck-Pro Wikiwiki. lilygo. cc/ 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.