Amazon.com Product Description
Ideal for use in retail locations or office mailrooms, the Royal RC40 digital rate calculator offers a number of useful functions in one sturdy package. With a maximum weight capacity of 40 pounds, this calculator processes shipping rates for U.S. mail, UPS, Airborne Express, and Federal Express, and can connect to the Internet for regular shipping rate updates. The one-touch tare function allows users to reset the scale to weigh the contents of a package without including the weight of the container, which can be especially handy in retail applications. The hold button leaves the weight onscreen after the package has been removed, making the correct reading of weights for oversize packages particularly easy to manage. There are four weight modes on the RC40--ounces only, pounds only, pounds and ounces, or grams--in increments of 0.2 ounce or 5 grams. Royal offers a one-year limited warranty.

From J&R Music and Computer World
The RC40 shipping scale is perfect for retail & mailroom environments, or even at home if you happen to run your own business. With it, you can easily calculate shipping rates for all the major mail carriers - USPS, UPS, FedEx, & Airborne Express. What's more, you can connect to the Internet and download regular shipping rate updates instantly!