The Shuttle accessory POS01 is compatible with the Shuttle All-in-One-PC X50V4. It will add four serial (COM), one parallel (LPT) port and one RJ11 port for a cash drawer to the back panel of the PC.
The POS01 expansion kit is compatible with the following All In One PCs:
with 15. 6 inch display: X50V4, X50V5(U3), X50V6(U3), X50V7(U3), X50V8(U3)
with 19. 5 inch display: P90U, P90U3, P90U5, P92U, P92U3, P92U5