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我們想開發一個BT speaker/Headset, 可以連手機(ANRDOID / IPHONE), 作播放及mic in功能. 想問一下那款合適, 是否FR309x / FR509X?? 如果FR309x / FR509X合適, 是否有相關方案/代碼可提供? 因為沒有DATASHEET可確定是否合適. 另外如果是給IPHONE使用, 是否需要MFI申請呢?? 或只是用標準AUDIO PROFILE不用特別 MFI申請?? 謝謝.