Que Powerbag Backpack - Built In Charging Station And Bluetooth Speaker. Rugged, Durable and Spacious Perfect for travel, picnics, work, school and everyday use. 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 via included USB cable Shock-resistant compartments shield your devices from the knocks and bumps of every adventure.