Specifications:

Speaker

Driver: 40 x 70mm / 1.5W x2 @4 ohm

Power Supply: 4 x AA Battery ( 6V )

Battery Life: max. over 100 hours

Function Control: Power on/off

Backpack

Color: Red, Grey, Black / Black

Size: (HxWxD) 50x36x12cm

Fabric: 600D Nylon Dobby

Lining: 210D PU Coating/ Black

Tape: PP Black

Zipper: Nylon Regular    

Foam: EVA & PE Foam

Buckle: Plastic / Black Regular

Capacity: 30 L

Features:

Superior class-D digital amplifier.

Unique water proof speakers hide in the straps.

Back padding and airflow channels for cool comfort.

Mesh pockets design

Mutli-Layer for different objects carrying

MP3 player holder pocket

Safety light refection bar

Headphones plug for speaker silence