The SAM4s ER-945 is a affordable, full featured, commercial grade electronic cash register. Great for small Retail, Gift Shops, Convenience Stores, Beer/Wine/Liquor, Specialty Food, Produce, Meat, Main Street Merchants. The traditional raised-key keyboard provides 21 keyboard PLU keys and can be expanded by your SAM4s dealer to 63 PLU keys. Single printer models are best for receipt-only or journal-only applications. If you choose a single printer model for printing receipts, you can record your journal electronically in the registers memory.