Product Features 1. Start up and check the battery voltage 2. Supports Bluetooth hands-free communication, with built-in microphone for convenient and safe answering of calls; Incoming call display 3. CVC for noise handling during calls, wind noise suppression, and full duplex call technology; 4. Support mobile A2DP function, directly play high-quality mobile music after connecting to Bluetooth; 5. After powering on, it automatically reconnects and enters the pairing state; 6. Support TF card extension for playing MP3/WMA format music; 7. Equipped with a car charger, with an output of 5V-3A, it can charge handheld terminal devices. 8. AVX port output input. Song name display Functional parameters: 1. Bluetooth V5.0 2. Dual display digital tube display 3. Support QC3.0 fast charging 4. Support for PD fast charging 5. Support for ambient lighting 6. Battery voltage detection 7. Automatic power outage memory function 8. Support stereo FM transmission technology 9. Support for USB flash drive playback 10. Support TF card music playback 11. Support music format files for WMA, MP3, WAV, and FLAC 12. Bluetooth supports A2DP, AVRCP, HFP, HSP 13. Bluetooth Handsfree Calling 14. Supports Bluetooth stereo music DSP technology