1、Dual Chip Combination: This isolated CAN bus expansion board adopts the dual chip combination program of for MCP2515 and for SN65HVD230 to support 2 channels of CAN interface communicating. 2、Integrated Power Isolation: This 2 channel isolated CAN board has an integrated power isolation on board, which can provide stable isolation voltage without additional power supply at the isolated end. Also onboard digital isolation chip, signal isolation communicating is more secure, better stability, stronger anti interference. 3、Good Performance: This CAN bus expansion board onboard for SM24CANB (transient voltage suppression tube), anti static and transient spike voltage, onboard level shifter circuit, can be switched through the jumper cap 3.3V, 5V operating level. Onboard 120Ω termination resistor, can be set through the jumper cap to enable, bring to the SPI control interface, convenient access to for STM32 and other host board. 4、Excellent PCB Material: This CAN bus expansion development board is made of excellent PCB material, which is sturdy and abrasion resistant, not easy to be damaged, and has a long service life. 5、Wide Application: This 2 channel isolated CAN board has a wide range of applications for Pi Zero, for Zero W, for Zero WH, for 2B, for 3B, for 3B+, for 4B, 5, and can be used for repair and modification.