Shuttle offers a wide range of optional accessory products for the Box-PC series BPCWL02 and BPCAL02. The Box-PC already features one fixed RS232 COM port at the back panel. With the Shuttle Accessory CSD01, an additional COM port (RS232/422/485) can be added to the front panel. In addition, you can install another COM port (RS232) with the Shuttle Accessory CRS01.