Connection and compatibility
Square’s U.S. compatibility matrix lists CD5 USB and printer-driven connections for Square Terminal, Square Handheld, Square Stand, Square Register, and iOS or Android with Square Reader. CD4 is listed as printer-driven for those same device families. The CD5 product page adds an important detail: USB on Square Terminal and Square Handheld requires the Hub for Square Terminal, sold separately; iOS uses the printer-driven path. For any printer-driven drawer, an external compatible receipt printer is required, and Square says the drawer will not appear in Available Cash Drawers even though it can be tested from Hardware settings.




