These scales are loaded with advanced features. Rates include USPS (1st Class, Parcel Post, Priority, Express Mail, Certified, Return Receipt, Registered & Airmail to Canada/Mexico), UPS, FedEx & DHL (Air and Ground Rates). Powered by AC Adapter (included). Ability to enter customized rates and can easily switch between lbs/oz and grams. Features letter stand plus tare and hold buttons and a larger platform and higher weight capacities great for envelopes and parcels. Download 2006 rates for Free! Platter size: 10.125 x 8.25 in., Capacity: 20 lb or 9 kg, Resolution: 0.1 oz or 2 g. Computes USPS, UPS, FedEx, DHL rates, including Certified, Return Receipt and more. No need to purchase replacement chips or dials when rates change. Download all current rates from internet--Serial PC cable included. Features tare/zero button, auto-off and letter stand for larger envelopes. Larger platform and higher weight capacities great for envelopes and parcels.