Plug in & out DesignPlug in & out design realizes display replacement within 30s; Extremely easy for maintenance and stock management; Modular Printer DesignAble to quickly change printer module; Easy for maintenance; All-in-One DesignReal All-in-One Design with inbuilt printer, the compact footprint perfectly fits for stores with limited counter space; Sufficient I/O InterfacesSufficient I/O interfaces: Ethernet, USB, RS232 and Cash Drawer port.