Detailed Product Description

Specifications:

* A2DP ready

* Works with all brand MP3 & Mobile Phone

* 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

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, Yellow, Blue / Black
* Size: (HxWxD) 47x27x12cm
* Fabric: 600D Nylon Dobby
* Lining: 210D PU Coating/ Black
* Tape: PP Black
* Zipper: Nylon Regular
* Foam: EVA & PE Foam
* Buckle: Plastic / Black Regular
* Capacity: 20 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
*Front elastic strings for extra objects carrying
*MP3 player holder pocket
*Safety light refection bar