1. Bluetooth version: 5.3 2. Transmission distance: about 10m 3. Frequency response: 20Hz-20KHz 4. Material: Metal 5. Input: DC5V 6. Music time: about 4.5h 7. Standby time: about 120 days 8. Charging time: about 1.5h 9. Zinc alloy appearance, personalized color matching design. 10. Bluetooth 5.3, lower latency, stronger anti-interference and lower power consumption.