Feature: 1. Using Bluetooth 5.0 chip; 2. Support Bluetooth reception (RX) and Bluetooth transmission (TX), FM transmission, TF card playback, 4 in 1 function; 3. TF card can receive, transmit, play in FM mode, and support mp3/flac/wav/wam/ape and other formats; 4. Built-in 300mAh polymer battery, continuous listening to music for about 6 hours; 5. Multi-function buttons, support switch/play/pause/up/down/volume up/down/source switching/frequency adjustment; 6. High-definition LED digital display, various working states are clear at a glance; 7. Cars without AUX interface also support FM transmission connection, the frequency can be freely adjusted between FM 87.5~108MHZ, universal, and the signal is stable and noise-free; 8. The Bluetooth transmission distance is 10 meters; 9. Built-in high-quality decoding chip, high-definition stable sound quality; Specification: Bluetooth version: 5 0 Bluetooth protocol: AVRCP/A2DP Music format: APE/FLAC/MP3/WAV/WMA Transmission distance: straight line distance of 10 meters Battery capacity: 300mAh (built-in) Charging time: about 1.5 hours Use time: about 6 hours Colors: White, Black Size: 55*21*15mm Note: This is a Bluetooth adapter, not a radio, and cannot accept FM audio,