Flip Top Cash Drawers are Top Opening and are available indifferent interfaces including USB & RJ12 (Receipt Printer or POS Terminal Driven).
The most common connection type for a Flip Top Cash Drawer is the RJ12 which is to be connected to the Drawer Kick "DK" port of your receipt printer. By connecting them directly to the receipt printer, it allows the drawer to open automatically when a sale has been finalized and/or receipt is printed.
Although this is the most common method to use them, you can still open them manually with a key.
Flip Top Drawers are less common as they generally require software development in order for them to operate. You may want to confirm this with the Point of Sale (POS) Software vendor before purchasing the USB version to save any disappointment. We do have options which will allow you to use a Cash Drawer Trigger