What is a TF card for a Bluetooth speaker?

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To remove the microSD card, push it even further into the slot until the lock releases, sending it popping partway out Do I need to format my

Equipped with BT , TF Card, and FM radio, this speaker is designed to enhance your audio experience in every way Stone 190 It comes equipped with 52mm MP3 player with TF slot ! Supports MP3WMA audio formats Interface:

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