Detectos DR series portable digital scales are accurate, reliable, lightweight and offer an economical advantage in a variety of environments. Mild steel platforms measure 12 x 12 inch (30.5 x 30.5 cm) and they offer your choice of 150 and 400 lb capacities. All models feature a 1-inch (25-mm) high LCD displaying 4 digits and 7 segments with four keys for On, Off, LB/KG and Tare/Hold. Measurements in pounds or kilograms. RS232 serial port for printer connectivity. 6AA batteries (not included) or AC adapter (included).