UPGRADED DETACHABLE WHEEL BAG: Canopy tent has upgraded the wheels of rolling bag for more convenient transportation. Changed from ordinary small plastic wheels to enlarged removable rubber wheels. Rubber wheels can adapt to more different road surfaces and are quieter during transportation. Note: Wheels are packaged independently. Please install the wheels first before use. FOUR DETACHABLE SIDEWALLS: Pop up canopy has 2 removable zipper side walls and 2 side walls with windows. Church windows are designed to increase light transmission and allow for real-time observation of surrounding conditions. Zipper wall can open or lower the curtain according to the needs of use, achieving the conversion of privacy and rapid ventilation.