Digital scale with PC interface. Easy to read LCD digits. Sturdy ABS plastic injection molded case & platform. Compatible with Endicia Internet Postage & WindowBook software. Units are selectable between lb / oz & g modes. Scale Type: Postal / Freight; Electronic / Mechanical: Electronic; Increments: 0.1 oz; 5 g; Power Source(s): AC Adapter (Included) or 9V Battery (Sold Separately).