21.5 inch LCD screen: the backpack is equipped with a customized LCD screen and Android system, which can play videos in mp4, mpg, rmvb, avi, mov, flv and other formats
Fashion backpak: Adjustable backpack shoulder strap, adjustable screen height at any time, comfortable handle, anti - scratch design
Working duration: It can work for 2-3 hours when fully charged
Portable and lightweight: the overall weight is 13.2 pounds, which is not too heavy as a portable billboard and is easy to carry
Easy to operate: the external USB port of the backpack is more convenient to operate, such as changing the content of the advertising video