Backpack dimensions: 17.2x12.0x6.0 inches, weight: 2.3lb. It is large enough for daily use, like keeping 15.6 inches laptop, iPad, 2-3 days summer clothes, and daily small items you need to carry.
Built-in Bluetooth audio speaker system. This system works with 2 loud speakers, we can link the Bluetooth by your phone after connecting your own power-bank, Then we can play and enjoy music when hiking, traveling, outdoor picnic, beach time, cycling etc.
Come with a chargeable emergency LED light. This removable emergency LED light works with 3 light modes for Lighting and warning : bright, bright+, red-blue flash. This LED light added on the left strap, it is a practical function for night cycling, walking, hiking, night camping etc.
USB2.0 charging port design. This backpack built-in USB charging port, connect it to your own power-bank, and use the original USB to connect the phone and the port on the waist fixed belt, then you can charge the phone or tablet.
Widely use occasions. This multi-functional backpack is widely use on your life. It is a unique design backpack for cycling, daily work, business trip, school time, beach, camping, hiking etc.