The smooth lines of the molded poly enclosure, lift-off stainless steel commodity tray, and sealed membrane keypad make cleaning easy. The commodity tray utilizes welded studs on the bottom of the tray that fit tightly into the weighbridge of the scale. The main board on each unit has a moisture resistant coating, adding additional protection from the elements of everyday use in the food industry. Comes with retail packaging in both English and Spanish. They can be operated on battery or AC power. The PS-11 also features a built-in rechargable battery.