Precision calibration for accurate multimeter readings using a stability resistor and capacitor reference board, designed for reliable calibration of measuring instruments and electronic testing applications. Complete component set: a selection of randomvalue resistors and capacitors mounted on a quality PCB material, providing multiple calibration points for thorough multimeter verification. Userfriendly operation: connect the positive and negative poles with the corresponding capacitors to obtain precise readings, making this board suitable for electronic production, teaching experiments, and automatic test systems. Durable construction: built from quality PCB material that resists temperatures and general wear, the 5x3 cm green board maintains calibration integrity through repeated use in various testing environments. 23 practical use scenarios: calibrating multimeters and test benches on production lines; supporting classroom and lab experiments in electronics courses; integrating with automatic test systems for ongoing instrument verification.