R4 WiFi Development board Suitable For Arduino. The R4 WiFi runs on the Renesas RA4M1 (Arm Cortex-M4) processor, with a clock speed of 48MHz. In addition to that, the SRAM has been upgraded from 2kB to 32kB and the flash memory has been increased from 32kB to 256kB to accommodate to more complex projects. Furthermore, in response to requests from the for Arduino community, the USB port has been upgraded to USB-C and the maximum power supply voltage has been increased to 24V. The board provides a CAN bus, allowing users to minimize wiring and perform different tasks by connecting multiple extension boards. Finally, the board also includes a 12-bit analog DAC. color: Black Material: PCB+electronic components Different batches may have different appearance, which does not affect use. Package Contents: 1 * R4 WIFI Development board 1 * data cable (The color of the data line is random and the color cannot be specified) Only the above package content, other products are not included. Note: Light reflection 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.