Product Detail Heavy-duty Electronic Utility Scale weighs items in 0.2-lb. or 0.1 kg increments. USPS rates are updated via an electronic process. Scale is powered by an AC Adapter (included) or 9V Battery (sold separately). Wall mount control panel; nine foot cord. Displays data at eye level. Shock-resistant load cell weigh mechanism. Intended for private use only; not legal for trade. Heavy-duty Electronic Utility Scale weighs items in 0.2-lb. or 0.1 kg increments USPS rates are updated via an electronic process Scale is powered by an AC Adapter (included) or 9V Battery . The "Pelouze 4040 Heavy-Duty Electronic Utility Scales w/12 x 12-1/2 Platform & 400-lb. Capacity" is best product for you. We recommended Pelouze 4040 Heavy-Duty Electronic Utility Scales w/12 x 12-1/2 Platform & 400-lb. Capacity