Check the listing for details. Digital Postal Scale Packages Electronic Postage Mail Parcel Weight Scale 50lbs. Condition: New. Listed at 28.55 USD. Digital Postal Scale Packages Electronic Postage Mail Parcel Weight Scale 50lbs ColorSilverDisplay TypeLEDWeight Limit50 PoundsProduct Dimensions9"L x 1.4"W x 6.1"HFold Up Mailer Holder-Stand upright to 90 degrees for rolling tubes and irregular packages.Use AC adapter, the scale will be always power on, Self-Calibration Technology: Does not require a 50lbs weight.Capacity-up to 50lbs; Sensitivity-0.1oz（0-25lb);0.2oz(25-50lb); Reading Modes-Pounds/ounces, ounces, kilograms/grams, gramsKey Functions-Tare(Allow you to reset the display to 0.0); Hold (Especially for Weighing a over-sized item)Self-Calibration Technology-Does not require a 50lbs weight. You can choose any known weight starting from 5 lbs for calibration purpose.Use AC adapter, the scale will be always power on