1. Bluetooth version: V5.0
2. Chip: AC6921A
3. Transmission power: 4dBm
4. Frequency: 2402MHz-2480MHz
5. Transmission distance: 10m
6. Supported format: WMA/APE/MP3/FLAC
7. Speaker: built-in magnetic speaker 5W x 4
8. Frequency response: 20Hz-20KHz
9. Signal to noise ratio: 80dB
10. Rated impedance: 4 ohm
11. Total harmonic distortion: 1%
12. Input: Bluetooth/TF card/RCA/3.5mm/USB stick/FM
13. Waterproof grade: IPX4
14. Battery: 18650 Lithium polymer battery 3.7V/2000mAh
15. Charging input: DC 5V 1A
16. Charging time: about 2 hours
17. Service time: 2.5-5 hours
18. Size: 550x60mm
19. Net weight: about 700g