Kingsons KS3140W Smart Backpack 15.6″ with USB Port, Dark Grey. It features water-resistant anti-theft laptop rucksack with USB charging port. The Anti-Theft zipper pocket on the back to secure your valuable stuff. The designer faked the pocket as back cushion, you can put your property such as phone or wallet etc. in it. Inside charging cable, can connect your own power bank. Kingsons Smart Backpack is perfectly suitable for 15.6-inches laptop, comfortable design to help you reduce the heavyweight.