ATRCT101 is a variable resistor and capacitor box used to manually select resistance and capacitance values for circuit testing, prototyping, troubleshooting, and laboratory work. It provides an adjustable resistance range from 1 ohm to 1000 kohm and an adjustable capacitance range from 10pF to 10uF in one compact unit.

With 1 ohm resistance resolution, 10pF capacitance resolution, and +/-1% accuracy, ATRCT101 helps users evaluate circuits quickly without repeatedly changing discrete components. It is useful for design verification, repair, education, and general bench work.

The front panel is easy to read during adjustment, and the enclosure is durable for regular use. ATRCT101 is a practical tool when fast, repeatable resistance and capacitance selection is needed.