USB scale connects to PC to allow postage printing capabilities. Compatible with DYMO Stamps and Endicia U.S. Internet postage. Includes rate calculating software and address correction software. Portable scale fits comfortably on desktop. USB powered with included cable or operates on 9 volt battery (sold separately). Offers a 10 lb capacity, auto shutoff, Tare and Hold feature. Flip-up platform prevents oversized envelopes from blocking the screen.