If you are using Epson T88V, U220 or T20 printers and connected cash drawers, you should be able to reuse that hardware.
For a tablet that doesn't need to process credit card payments, look for an Android tablet running Android 4.0 or greater. Note that the audio jack credit card reader (MagTek uDynamo) is only compatible with certain Android tablets. We recommend the Samsung Galaxy Tab 2 (both 7" and 10") for a device that will use an audio jack reader, and the Samsung Tab 4 10" (ask about our terminal bundles!) tablet for a terminal that uses our USB card reader.