2' portable thermal bill printer easy paper loading, serial,USB & Bluetooch. Li battery back up, MSR for option. portable thermal bill printer1, printing method: direct thermal line print2, paper supply method: easy paper loading3, print width: 48mm4, character size: Font A, 12*24dots,5, character per line: Font A, 32CPL.6, print speed: 60mm/s7, paper width: 57mm8, receive buffer size: 32k bits9, ...