1. Bluetooth version: V5.0
2. Microprocessor: AC6921A
3. Transmission power: 4dBm
4. Frequency: 2402MHz-2480MHz
5. Transmission distance: 10 m
6. Supported format: WMA/Mono/MP3/FLAC
7. Speaker: Built-in magnetic speaker 5W x 4
8. Frequency response: 20Hz-20KHz
9. Signal to noise ratio: 80dB
10. Nominal impedance: 4 ohms
11. Total harmonic distortion: 1%
12 Input: Bluetooth/TF card/RCA/3.5mm/USB flash drive/FM
13. Waterproof grade: IPX4
14. Battery: 18650 3.7V/2000mAh lithium polymer battery
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
