This Multi-functional Speaker Backpack can play music through a 20W speaker for up to 12 hours on a single charge. Charge a smartphone one full-time w/ the pack. Pair w/ your device from up to 65 feet away for extreme flexibility. Enjoy lightweight, breathable comfort & multiple compartments to store all of your accessories, clothing, & more.

Features: 

• USB Power Bank (included) - stay energized with 5200 mAh battery providing 2 full charges for your devices. can work up to 12 hours per charge.
• Designed for You - The backpack designed the way to perfectly fit your shoulders and eases your muscles with 360 Degree Breathable Comfort
• Colorful LED Lights - transforms from one color to another automatically when playing audio, so no need to choose the color of the SHELL backpack
• Max-bass System (Subwoofer included) - powered by a 20W output (5WX2) HI-FI Built-in Bluetooth Speakers with LED. It can literally be heard through a storm, wind and more.
• Waterproof Backpack -  waterproof rated IPX5 able to withstand water jets.
• Shockproof Protection - EVA Manufactured materials allow for complete.
• Remote Controller (see the details below) -Remote control helps you to move your way through your adventure with convenience! Pair Instantly!
• Backpack's Multi Compartments - provide enough storage space for your accessories, wireless headphones, gadgets, clothing, your power juice, etc.
• Internal USB - internal USB output power bank to charge all your USB enabled devices - smartphones, e-reader, laptop, Bluetooth speaker, wireless headphones, tablets, notebooks, etc. 
• Advanced Connectivity Technology - allows your Shell Backpack to pair up to 65 feet away! High-Speed Bluetooth 4.0 Connectivity allows for auto pairing.