We require following types or thermal printer. Paper Widths: - Up to 2 1/8" or 54mm Resolution: - 203 to 300 DPI resolution Print Technology: - Direct thermal Interface: - USB and RS-232 (serial) Print Speed: - 3-6 seconds per Label Weight: - Below 1 Kg Software: --- Barcode Symbologies Code 39, UPC-A, UPC-E, EAN 13, I 2/5, Code 128 and Codabar Networking: - Printer sharing via Windows networking * Eliminate the hassle and expense of printing labels with a standard printer  * No ribbons, toner or ink needed  * conection: USB and Serial * Working with Windows 2000, XP, Vista and Mac OS X (10.2.8 or later).  * 230v power supply adaptor