Description of BS28B:
Product Features:

1. Adopt Bluetooth V4.0 version

2. Use 4 full-frequency speakers

3. USB interface, U disk audio input function

4.TF card audio input function

5.3.5mm audio input

6.FM radio function

7. Use micro charging port

8. Can control the volume addition and subtraction

9. Can control songs up and down song

10. Can control song pause and play

Product parameters:

Bluetooth version: Jerry V4.0

Battery Type: 18650 polymer battery

Battery capacity: 2000mA

Use time: about 3.5 hours

Output power: 4 euro * 5W

Frequency response: 20Hz-20KHz

Transmission frequency range: 2.402G-2.480G

Signal to noise ratio: ±80db

Transmission distance: 8-10m

Charging type: microUSB 5V/1.5A

Size: BS28B: 550*50*50mm  , BS28A: 330×50

Package Included:
1*Speaker
1*Charging cable
1*3.5mm RCA cable
1*Remote controller
1*User manual

Description of BS28A:
Channel:2.0
1. Bluetooth version: V4.2
2. Speaker: 5W*2
3. Bluetooth distance: 10M
4. Battery capacity: 2000mA 3.7V
5. Nominal voltage: DC 5V
6. Music playing time: about 5 hours.
7. Standby time: 240 hours.
8. 1A Charging time: about 2 hours.
9. Audio Input: Bluetooth, USB, 3.5mm Aux, TF card
10.Dimension: 330 x 50 x 50mm / 12.99 inch x 1.97 inch x 1.97 inch
11.Net Weight: about 420g
12.FM Radio Frequency: 87.5-108
13.Accessories: charging cable, 3.5MM audio cable, manual
14.Support PC/Phone/Tablet/Laptop/MP3/MP4 Audio