Specifications:

Speaker

Driver: 50 mm /1.5W x 2 @ 4 ohm

Power Supply: 2 x AA Battery ( 3V )

Battery Life: Max. over 40 hours

Function Control: Power on/off

Backpack

Color: Blue, Red, Grey

Size: (HxWxD) 21x24x16cm

Fabric: 600D PVC

Lining: 210D Nylon Coating/ Black

Tape: PP Black

Zipper: Nylon Regular

Foam: EVA & PE Foam

Buckle: Plastic / Black Regular

Capacity: 6 L

Features:

Lunch box with audio system.

MP3, CD player suitable for use.

Soft handle bar holder behind back side.

Double Cozy layer to keep warm/Cool.

Drink layer design easy for use

Low consumption amplifier.

Unique speaker hide in pack.

Refection bar for safe.