EOM-POS USB Cash Drawer Trigger (BT-100U) – Connects RJ11/RJ12 Cash Drawers to Windows PCs Without a Receipt Printer. NOT Compatible with Square Use your cash drawer without a receipt printer. The EOM-POS BT-100U USB trigger allows you to connect a standard RJ11/RJ12 printer-driven cash drawer directly to a Windows PC via USB. Ideal for setups without a POS printer. Appears as a virtual COM port (e.g., COM1, COM2) so your POS software can open the drawer using standard serial commands. Plug-and-play for Windows. NOT compatible with Square or Mac. USB cable included—just connect and configure. Lifetime Warranty & Tech Support included. Does not work with Square! For a Windows PC only! For connecting a RJ11/RJ12 Printer- Driven Cash drawer to a windows PC only. Plug and play- Creates a serial port (COM1, COM2 etc..), which then pops the drawer with any command to that port. Enables The Use of A Cash Drawer Without The Need For a Receipt Printer Plug the USB end into your computer, and plug the Cash drawer into the other end