Features: Model:SF-400 Name:Electronic scales 1.Capacity: 1kg/10kg 2.Accurate to 0.1g/1g 3.Power supply :2 x AA batteries 4.Low power consumption 5.Auto zero-auto off 6.Low battery/overload indication 7.Unit ( g/oz ) display 8.Auto zero resetting 9.Auto switch off in 120 seconds without operation 10.Size:237x165mm Tare function： First to put the plate in the scale,you can get the weight of the plate ,then press "TARE" and put the flour then you will get the weight of them.after that you should minus the weight of the plate，finally can get the weight of flour5