The Stamps.com 5lb Digital USB Postal Scale Model 510 is a small postal scale designed for accurate and efficient weighing of packages and letters. This scale is suitable for use with both Windows and Mac operating systems, making it versatile for a range of businesses and individuals. Made by Stamps.com, a trusted brand in the shipping and postal industry, this scale offers reliable results in lb units, and is manufactured in China. Perfect for material handling and packaging needs, this digital USB postal scale is a valuable tool for ensuring proper postage and shipping.