Description:（BS-28A short，BS-28B long）
1. Adopt Bluetooth V5.0 versio
2. Use 4 full-frequency speakers
3. USB interface
4.TF card audio input function
5. 3.5mm audio input
6.FM radio function
7.RCA input function
8. Can control the volume addition and subtraction
9. Can control songs up and down song
10. You can control the pause and playback of songs
Specifications:
1. Bluetooth version: V5.0
2. Speaker: 5W*2（BS-28A short）
5W*4（BS-28B long）
3. Bluetooth distance: 8-10M
4. Battery capacity: 2000mA 3.7V
5. Nominal voltage: DC 5V/IA-2A
6. Music playing time: about 4 hours.
7. Standby time: 240 hours.
8. 1A Charging time: about 2-3hours.
9. Audio Input: Bluetooth,3.5mm Aux, TF card ，U disk（BS-28A short）
Bluetooth,RCA,3.5mm Aux, TF card （BS-28B long）
10.Dimension: 330 x 50 x 50mm （BS-28A short）
550 x 50 x 50mm （BS-28B long）
11.Net Weight: About 850g
12.FM Radio Frequency: 87.5-108
