Desktop mailing solution integrates a postage scale and label printer with no monthly fee. Weigh up to 10 lb. on the included scale, click to calculate and purchase the correct USPS-approved postage with Dymo Stamps software. Prepare postage for First Class (1-13 oz.), Flat Rate Priority Mail, Express Mail, Postcard and International Mail (1 oz.). Print your postage and address label with the Twin Turbo Label Printer. Mailing solution works with your PC (Windows XP/Vista, 32-bit or 64-bit) or Mac (OS 10.4 or higher). Label printer holds two rolls so you can print postage and address labels without swapping label rolls. Thermal print up to 71 four-line address labels per minute with no ink or toner. Mailing solution includes 50 stamps labels and 130 address labels. Internet connection is required. Dymo Stamps service is provided by Endicia, a licensed USPS PC Postage provider.