Bluetooth:
1. Chip: AC6901A
2. Bluetooth connection distance: 10M
3. Bluetooth version: V4.2+BR+EDR+BLE
4. Transmission power: 4dBm
5. Frequency: 2402MHz-2480MHz
6. Supported formats: WMA/APE/MP3/FLAC
Audio:
1. Speaker device: internal magnetic speaker
2. Rated power: 5Wx4
3. Diaphragm parameters: air duct device
4. Frequency response: 20HZ-20KHZ
5. Signal-to-noise ratio: -80db
6. Rated impedance: 4 ohms
7. Total harmonic distortion: 1%
8. Music file format: WMA/APE/MP3/FLAC
9. Storage type: WMA/APE/MP3/FLAC
10. Input audio source type: support Bluetooth/TF card/U disk/3.5mm
11. Waterproof function: IPX4
Power Supply:
1. Type: 18650 aluminum polymer battery
2. Rated voltage: 7.4V
3. Battery capacity: 2000mA
4. Bat
