Features: The 3.3/5V Level to RS485 Serial Adapter Board features a versatiled SP485 chip and isolation conversion. Supporting 5V, 3.3V level, ensuring seamlessly compatibility across various devices. This converter cable boasts fast speed transmission enhancing user experience and operational efficiency. For programmers, hardware engineers, and enthusiasts, this adapter provides reliabled solution for those requiring efficient serial communication interfaces. Perfect for integration in auto home systems, industrial automation, and applications, the converter facilitates efficient communication between multiple devices. Specifications: Item：3.3/5V Level to RS485 Serial Isolation Converter Board Optional: 3.3V / 5V Cable length about 30cm/11.8in Chip: SP485 Size: about 5.8x3.0x1.0cm/2.28x1.18x0.39in Package Includes: 1PC 3.3/5V Level to RS485 Serial Isolation Converter Board note: Due to problems of lighting effects there will be certain tolerances in product, please understand. Please allow 0-1cm error due to manual measurement