1. Bluetooth version: Bluetooth 5.4 2. Chip: Jerry JL 3. USB-A1 music interface output: 5V/0.5A 4. USB-A2: 18W (QC/FCP/AFC) 5. USB-C: 20W (PD/QC/FCP/AFC) 6. USB-A+USB-C: 38W 7. Size: 79 x 46 x 52mm, weight: 40g 8. Support Bluetooth, USB flash drive (less than 32GB) to play music 9. Bluetooth 5.4 chip, faster and more stable connection 10. LED screen displays battery voltage, power status is clear at a glance