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With this RS485 to TTL card, you can quickly connect to the RS485 network, suitable for Raspberry Pi, Arduino, robots and other MCU Main chip is MAX13487 by MAXIM, high stability. LED indicator for TXD, RXD, Power With 15KV ESD protection and TVS surge protection Transmission rate up to 500 Kbps, supports communication with multiple computers, allowing up to 128 slave devices International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.