2-Channel Isolated CAN Bus Expansion, Multi Onboard Protection Circuits; Enable Isolated And Stable CAN Bus Capability For Your Raspberry Pi; Standard Raspberry Pi 40PIN GPIO Header, Customized For Raspberry Pi Series Boards; MCP2515 CAN Controller + SN65HVD230 CAN Transceiver; SM24CANB TVS Diode, ESD Protection, Transient Peak Voltage Protection