It's only bluetooth transmitter receiver.It doesn't include TF card.The maximum size for TF memory card is 64GB.<br>Bluetooth version:5.0(Backward compatible with 4.2/4.1 versions).<br>Bluetooth protocol:AVRCP.A2DP<br>Bluetooth distance:About 10m<br>Battery:300mAh<br>Charge time:About 1.5H<br>Use time:About 6H<br>1.It supports Bluetooth reception (RX) and Bluetooth transmission (TX), FM transmission, and TF card playback. The function is 4 in 1, and the functions are fully suitable for different scenarios.<br>2. Receive mode: suitable for old-fashioned speakers without Bluetooth function, power amplifiers, wired headphones, cars and other devices with audio input interface.<br>3. Transmission mode: suitable for computers, TV sets and other equipment with audio output interface.<br>4.FM mode: The mobile phone is connected through Bluetooth and FM, and you can listen to a large number of songs from 87.5-108MHZ.<br>5.TF card mode: Receive, transmit, FM mode all support TF card playback, support mp3/flac/wav/wam/ape and other audio formats.<br><br>