DIGIWEIGH 50lb/ 23kg USB DYMO ENDICIA POSTAL SCALES, BLACK COLOR Integrated with DYMO Endicia Software for Microsoft Windows Capacity: 50lb/ 23 kg; Weighing Mode: lb-oz/ lb/ kg-g; Readability: 0.1oz/ 0.1lb/ 5g TARE function covers unit's full capacity range Flip-up platform can hold large envelopes Powered by USB port or 9V battery (included)