Futures a LOCK mode: With this feature you can place oversized packages on the scale and leave it there for a few seconds * Easy buttons: ON/Off tare and mode Auto off Feature (after 180 seconds) and Low Battery Indicator. * Sensitivity up to a fifth of an ounce (0.2 oz - 10g) makes sure that you accurately weigh your packages for postage * Measuring units: Pounds / Ounces Kilograms / Grams Sensitivity: 0.2oz. * Power source 9-volt Battery or 9 V DC Adaptor (both included) this scale also has a LIFETIME WARRANTY from the manufacturer