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1. Question: What are the pixel sizes available for the LED display boards listed? Answer: The pixel sizes available are 3.91mm and 6mm. 2. Question: Can the "P2.9 P3.9 P4.8 Led Display Board" be used for advertising in subway stations? Answer: Yes, it can be used for advertising in subway stations among other applications like elevators, restaurants, hotels, medical treatment areas, retail stores, shopping malls, airports, and exhibition halls. 3. Question: Is there a warranty or support for customization offered by the suppliers of these LED display boards? Answer: Yes, OEM (Original Equipment Manufacturer), ODM (Original Design Manufacturer), and in some cases OBM (Original Brand Manufacturer) support is offered, indicating that customization and warranty support are available. 4. Question: Are the listed LED display boards suitable for outdoor applications? Answer: Yes, specifically the "2021 Outdoor 3D LED Billboard Digital Signage and Display Board for Advertising LED Screen" is designed for outdoor applications. 5. Question: What types of media are available for these LED display boards? Answer: The types of media available include datasheets, photos, and EDA/CAD models. 6. Question: Can the "2022 newest coming street pole led programmable advertising digital video display board" be used for educational purposes? Answer: Yes, it can be used for educational purposes as well as for wayfinding, displaying dishes, retail stores, medical treatment, self-service business, advertising publish, exhibition halls, restaurants, and hotel supplies. 7. Question: What is the installation type for the "P2.9 P3.9 P4.8 Led Display Board 500x1000mm Outdoor LED Display Screen P3.91 Medium 128x256 RGB LED Matrix Panel"? Answer: The product information does not specify the installation type directly, but given its application in various settings, it likely supports versatile installation options including standing and possibly wall-mounted types. 8. Question: Are the LED display boards listed capable of displaying video content? Answer: Yes, given their specification as video walls and their use in advertising publish, these LED display boards are capable of displaying video content. 9. Question: What is the functional design of the "2022 newest coming street pole led programmable advertising digital video display board"? Answer: The functional design is not explicitly mentioned, but given its application, it likely features a programmable and multifunctional design suitable for various content displays including wayfinding and advertising. 10. Question: Do any of the LED display boards offer features for specific applications like welcome displays or displaying dishes in restaurants? Answer: Yes, the "P2.9 P3.9 P4.8 Led Display Board" and the "2022 newest coming street pole led programmable advertising digital video display board" mention use for welcome displays and displaying dishes, indicating they have features suitable for these specific applications.