Features: The CH9121 to Ethernet module provides stable fast data transfer for industrial automation and smart home devices for RS485 auto switching. Features broad protocols conversion Works with both 3.3V/5V levels and supports automatic MDIX crossover for flexible cable connection. Perfect for diverse IoTs applications. Compactly module ensures reliability in space constrained projects. Low power consumption (≤1W) with double voltages support (DC3.3V/5V) makes it energy efficient. Plugs Play fast data transmission between and networking interfaces without complex configuration. Features parameter storage during power off and supports remote setups Embedded with intelligent monitoring functions supporting 10/100M adaptive Ethernet (802.3 compliant). Enables remote diagnostics and real time tracking. Specifications: Working voltages: DC3.3V/5V Working current: 200mA@5V Power consumption: ≤1W Supports 5V or 3.3V power supply port compatibles 3.3V or 5V Supports 300~921600bps Package: pins soldered / not soldered Supports full-duplex and half-duplex communication, automatic switching of RS485 transceiver; Two-way transparentcy transmission of port data and networking data; Supports automatic MDIX polarity conversion Support 10/100M, adaptive Ethernet Supports port to Ethernet function, CH9121 chip, supports more protocols, providing fast and stable data transmission Package Includes: 1PC CH9121 port to Ethernet module note: Please allow 1-2cm errors due to manual measurement. Pictures may not reflect actual color due to different monitors.