500 x 500 mm P3.9 Mwall LED display, SMD2020, copper wire, full black LED, for indoor fixed installations (800-1000 nits) with 9000:1 contrast. The possible application scenarios are: hotels, schools, shopping malls, multifunctional rooms of companies and institutions, conference rooms, sports facilities, stations and terminals, etc... Thanks to a die-cast aluminum alloy cabinet, it is lighter than other similar products, more precise in structure, and provides better flatness of the entire screen. The positioning of the module with a magnetic system allows for greater assembly speed. The magnet is directly fixed on the PCB board, the accumulated tolerance is very small. The cabinet is light and slim, weighing only 6 kg per tile and the thickness is 65 mm, for savings installation costs and space: ideal for wall mounting, it also allows stacking on the ground. The module, the Hub board and the receiving card are based on a wireless design. Fire resistance can reach V-0, eliminating the risk of incurring fines. The lamps are protected from collisions by a shockproof design at the bottom of the cabinet. The high refresh rate of 3840 Hz, fast decoding response of the driver, smooth display effects and contrast of 9000:1 enhance the overall image quality for an excellent visual experience. Wide 160° viewing angle, no color difference, reduced pixel pitch to optimize close observation are further features of this LED display. Uniform heat dissipation ensures the long-term durability of the product. The test button is able to test each module before installation. The cabinet and control box are compatible with different modules at different resolutions, upgradable freely, minimizing the purchase cost. The 10° outward bend accommodates multiple applications. Finally, P3.9 Mwall allows front maintenance: modules, power supply and receiving card can be removed from the front. Quick lock structure (optional) makes the LEDwall faster to install.