HP Engage Serial Ethernet USB Thermal Printer 203 x 203 DPI. Print technology: Thermal, Type: POS printer, Maximum resolution: 203 x 203 DPI. Maximum roll diameter: 8 cm, Roll core diameter (max): 2.5 cm. Connectivity technology: Wired, USB connector: USB Type-A / USB Type-B, Serial interface type: RS-232. Internal memory: 8 MB, Print head life: 150 km, Mounting position: Horizontal. Product colour: Black