<p>This backpack is designed to be your go-to companion everywhere the adventure takes you. It has a 5000mAh battery and a water-resistant shell, allowing it to play music for up to 6 hours. It can pass a charge through three hardwired power cables: Lightning, USB-C, and USB-A (to charge the battery)It has a nylon-coated EVA foam shell, which is water-resistant and shock-resistant as well. Ideal for all outdoor activities from the hanging out at the beach to camping in the mountains. Hidden zipper for the main compartment located on the side to deter theft. Organization compartments and a laptop sleeve that impressively fits your laptops.</p> <p> </p> <p>Dimensions: 16 x 7 x 21 in inches</p> <p>Weight: 5.2 pounds</p> <p>Storage: 12 liters</p> <p>Playback time: 8 hours</p>