Specifications:

Speaker

Driver: 20 x 40mm /1W x 2 @ 4 ohm

Power Supply: 4 x AA Battery ( 6V )

Battery Life: Max. over 40 hours

Function Control: Power on/off

Backpack

Color: Yellow, Light blue, Grey

Size: (HxWxD) 52x33x15cm

Fabric: 600D Nylon Dobby

Lining: 210D PU Coating/ Black

Tape: PP Black

Zipper: Nylon Regular    

Foam: EVA & PE Foam

Buckle: Plastic / Black Regular

Capacity: 25 L

Features:

Low consumption amplifier.

Unique speakers hide in the straps.

Front pocket easy for use.

Mesh pockets design

Laptop protect layer design.

MP3 player holder pocket.