Features: brand new and high quality The RS485 CAN expansion board specially designed for Raspberry Pi to solve the problem that the Raspberry Pi does not have a 485 CAN interface Standard for Raspberry Pi 40PIN GPIO extension header, supports for Raspberry Pi series boards With CAN function, onboard CAN controller MCP2515 via SPI interface, onboard transceiver SN65HVD230 RS485 function, controlled via UART, half-duplex communication, supports automatic TX/RX control without programming, onboard transceiver SP3485 Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit for RS485 transceiving, lightning-proof & anti-electrostatic With reserved control pins, allows to work with other control boards Specifications: Operating voltage: 3.3V CAN controller: MCP2515 CAN transceiver: SN65HVD230 485 transceiver: SP3485 Dimension: approx 65mm x 30mm/2..56x1.18in Mounting hole size: approx 3.0mm Note: Please allow 1-2cm errors due to manual measurement. Because of the different display of each computer, the pictures may not reflect the actual color of the item. Package includes: 1 piece x RS485 Expansion CAN HAT