Kinmac Laptop backpack is special and multi function Massage cushion on both of the straps,make you comfortable even the backpack is very heavy. With USB Charging port and Built-in USB cable. Use it to connect the power bank, then connect your phone with original USB cable to the USB port, you could charge your phone conveniently.(Please notice: The outside white cable, power bank and cellphone are not included) Can hold laptop up to 15.6 inch.The backpack have Big capacity and abundant pockets inside. Product information Product Dimensions ‎5.51 x 11.81 x 17.64 inch Used, like new condition