US Digital 35 LB Pound Postal Shipping Scale - Battery and AC Adapter Included Exclusively from Unique Imports Features a LOCK mode and Also Futures a TARE mode Easy buttons: ON/Off tare and mode Auto off Feature and Low Battery Indicator. The LCD Display also futures a Flip-up Platform for Envelopes tubes. Sensitivity up to a fifth of an ounce (0.2 oz - 10g) makes sure that you accurately weigh your packages for postage. Power source 9-volt Battery or 9 V DC Adaptor (both included) this scale also has a LIFETIME WARRANTY from the manufacturer