Store › X-RTC add-on for ModXo-Basic: PCB Image 1 of 1 X-RTC add-on for ModXo-Basic: PCB $4.99 This is a blank PBC and will require assembly. BOM and instructions can be found on our GitHub. Quantity: Add To Cart Added! This is a blank PBC and will require assembly. BOM and instructions can be found on our GitHub.