Shopwave is compatible with bluetooth and ethernet printers. Bluetooth are the simplest to set up and are recommended for single terminals. They do not require a router or cabling to operate. iPads can communicate with multiple bluetooth printers or other bluetooth devices but bluetooth devices can generally only communicate with one iPad. Ethernet printers are required if you want more than one iPad to connect to the same printer for example a kitchen order printer. For each ethernet printer you need to run ethernet cabling from your router to the printer location.