No, this is not a must situation if you want a review, 5 stars should be suffient.
Easy to order- fast delivery
Exactly what I was looking for.

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.
7%+ sales tax in some states
Long shipping times
High Shipping Charges
Costly Return Charges
No Sales Tax (except NJ)
Fast, Same Day shipping
Free Shipping
Free Returns