Que Powerbag Backpack - Built In Charging Station, Bluetooth Speakers, And Thermal Lunchbox (Blue) Perfect for school, keep your lunch fresh, keep your gadgets charged. Built in Bluetooth speakers compatible with Tablets, Smartphones MP3 Players and Computers. The full-sized internal USB port allows you to charge almost anything. Battery can be charged easily in or out of the bag. High density thermal insulation for keeping all your food cold and fresh.