Citizen CL-S521. Maximum resolution: 203 DPI. Print technology: Direct thermal, Print speed: 150 mm/sec. Interface: USB 1.1, Serial, Fast Ethernet, Optional connectivity: Ethernet, Serial (RS-232), Connectivity technology: Wired. Internal memory: 16 MB, Flash memory: 4 MB. Width: 231 mm, Depth: 289 mm, Height: 183 mm