The Decade Boxes are built into a light weight plastic casing. These are very easy to use for testing and calibration of test & measuring equipments. Their main function is to create a value of passive elements (Resistance, Capacitance, Inductance) using a combination of the rotary decade switches (for Resistance and inductance). For capacitance boxes toggle switches are used. A wide range of passive element is selectable from a given assembly and which allows direct read out from the position of knobs. Values can be obtained from the onboard terminal.