J.J Lloyds Instruments Capacitance Decade Box 100V DC

An electronic test equipment which uses a series of switchable capacitors to provide a variable, precise capacitance value for use in circuit design, testing, and calibration.

It allows a user to select a precise capacitance value by adjusting the four rotary dials, which are arranged in "decades" (multiples of ten).

The unit measures capacitance in microfarads (MICROFARADS), with scales for X10⁻³, X10⁻², X10⁻¹, and X10.