B16 AUX Wireless Bluetooth Receiver Support TF card 1. Supports playing music from TF card. You can output the music in the TF card through the 3.5mm audio port in RX mode, or output the music in the TF card to the Bluetooth speaker through Bluetooth in TX mode. 2. After inserting the TF card, it will automatically switch to music mode or manually double-click the power button to switch to music mode (if it cannot be switched, please format the TF card and check whether the music is in MP3 or WAV format). 3. Bluetooth version: 5.3 4. Support protocols: A2DP, AVRCP, HFP, SPP HID. 5. Receiving operating current: less than or equal to 43MA 6. Transmitting working current: less than or equal to 60MA 7. Standby current: less than 18MA 8. Built-in battery: polymer 250MAH 9. Charging current: 200MA 10. Service life: 5-8H 11. Bluetooth distance: greater than 10M (empty space) 12. Charging method: USB-C 5V1A 13. Output connection method: 3.5MM stereo interface 14. Input connection method: 3.5MM stereo interface 15. TF card memory: 16GB max (MP3Wav) 16. Compatible with: Android, IOS mobile phones and IPAD, and other Bluetooth audio devices, audio devices with audio input 17. Packing list: Bluetooth transceiver x 1 Instructions x 1 USB power cable x 1 3.5mm audio cable x 1