Adopts MCP2515 and SN65HVD230 dual chips combined solution, allows 2-channel CAN communication Integrated power isolation, providing stable isolated voltage, requires no extra power supply for the isolated terminal Onboard digital isolator, signal isolation makes the communication more safe, more stable, and better anti-interference Onboard (Transient Voltage Suppressor) diode, provides ESD protection and transient voltage protection Onboard voltage translator, select 3.3V/5V operating voltage by jumper Onboard 120ohm terminal resistor, configured by jumper Breakout SPI control pins, for connecting with host control boards like for STM32/ Colour:blue Material:plastic Size: 65 x 56.5mm Package Contents: 1 x Expansion board Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.