Room Space Size 16.5*11.4*7 Inch, this is a professional fashion business backpack, large capacity, multi-layer, can provide a separated space for your Laptop, iPhone, iPad, pen, keys, wallet, books, clothes,bottle and more. USB Port Design, Convenient for Charging With built in USB charger outside and built in charging cable inside,this usb backpack offers you a more convenient way to charge your phone while walking. Please noted that this backpack doesn't power itself, USB charging port only offers easy access to charge Ergonomic Design, Comfortable & Breathable Ergonomic design of S-shape padded shoulder straps and padding back design, made from high elastic and breathable sponge and fabric, equipmented with adjustable chest buckle and ring type adjustable hasp, adjust the strap length freely , reduce the burden of weight, protect the back and shoulder effectively, more comfortable for your life." "Product origin : China Key Specifications/Special Features : Place of Origin China Port Of Loading Xiamen Port Payment Term TT,LC,Western Union Delivery Time 30-45 days Minimum Order Size and Packgaing details : 50PCS 1pc/bag, 24pcs/ctn"