The Salter Brecknell Digital Postal Scale SBW311 is a weight-only electronic scale designed for letter and small parcel mail, ensuring accurate postage without overpayment. This office scale features a postage rate chart, Off, On/Zero, and Unit buttons, with a capacity of 11 lbs. It displays weight in lb/oz or kg/g, and its low-profile design makes it easy to use and store. The scale operates on four AA batteries, which are included.