Blue Speaker Backpack Audio Output Slot 5V / 3.7V lithium battery

Backpack structure

• One main pocket with opening pocket.
• One front pocket convenient for put the little things in.
• Two mesh pocket on the bottom for hold the water bottle.
• With two side zippered pocket for hold 5W*2 speakers.
• Helmet pocket with buckle to take helmet in.
• With airflow back system provide extra padding for comfort and maximum back support.

Backpack parameters

Backpack Features

• Stitch webbing in the middle for clip small stuff,
• 1500Mah lithium battery can be used continuously for more than 8 hours.
• With control line, is convenient to click the function button.
• Download files to TF card from computer by connecting the device to computer with USB cable line and charge the device at the same time.