Fangrui Product Details 1. Adopting High-performance Stm32g4 Series Microcontroller, With A Running Frequency Of Up To 170m. 2. Support Can2.oa, Can2.0b, And Can-fd Protocols For Faster Speeds. 3. Support Firmware Updates On Web Pages, Easy To Use, And Open Source Data. 4. Support Open Source Upper Computer Cangaroo Can Protocol Analysis Software. 5. Easy To Use, With Three Color Led Status Indication. Note:due To Different Production Batches, The Appearance Is Different, Which Does Not Affect The Use. Input Voltage:5v Interface:type-c Power Supply Instructions For Use: 1. Type-c Mother Base: Connected To The Computer Through A Usb Cable 2. Boot Startup: After Short Circuiting And Inserting Type-c, It Enter Boot Mode And The Firmware Can Be Burned Again 3. Terminal Resistor Option: Insert The Jumper Cap To Indicate The Connection Of A 120 Terminal Resistor 4. Output Interface: Can_ H And Can_ L Connected To Can Bus Gnd Can Be Connected Or Not 5. Insert The Computer And The Three Color Lights On The Board Light Up. Serial Dev