Make sure your packages have the right postage, every time. Ideal for home offices or small businesses that send out a high volume of mail, the PLUS30USB postal scale helps you determine the correct postage for any item weighing between 0 and 30 pounds. This scale is USB powered and includes a USB cable which makes for easy interface with major online postage sites, simplifying the shipping process. It features an easy-to-read 7-segment 6 digit LCD display, a Tare function that lets you re-set the "zero" weight (great for weighing loose items in a container without counting the container itself), mechanical overload protection should you weigh an item that exceeds 30 pounds and a 5-minute auto-off function that preserves power. Plus, you can power the scale using the included USB cable, or standard 9-volt battery or the optional AD9 adapter (not included), which makes it ideal for business professionals who travel frequently to trade shows and other on-the-go locations.