Currently available outdoor P4, P5 P6. P8. P10 and adopt water chestnut assembled technology, can realize any size bar, arc, wavy. Module except the waterproof ring is designed around the module suite at the bottom of the tank, there is a vent, make our products more adapt to the natural environment, to enhance the waterproof performance and service life of the product. Indoor P2, P3, P4 models of cylindrical screen adopt without water chestnut assembled technology, also can realize any size of cylinder, arc, wavy, etc., using special box body improve the flatness of the ordinary circular screen.