Large-capacity Waterproof Expandable Hard Shell Backpack with USB Charging Hole(162 Deep Gray) Car Electrical Appliances Support for command based and

Support for command based and FIS-based endports

locker rooms

lightweight and portable with switchable backlight & large LCD display for clear reading

anti-shock and anti-fog

Large-capacity Waterproof Expandable Hard Shell Backpack with USB Charging Hole(162 Deep Gray) Car Electrical Appliances Support for command based and1. Material: ABS 900D strong film, EVA, polyester 2. Function: waterproof, with USB charging hole, shock resistance, capacity expansion, cut resistance, dry and wet separation 3. Accommodates computer size: 17 inches 4. Design of USB charging interface on the side of the bag 5. Widened and thickened handle design, comfortable and durable 6. Two way zipper, more convenient to open and close 7. Side handle design, a variety of carrying methods 8.