Features Versatile Resistance Substitution Box: Offers a cost-effective alternative solution for the "resistance substitution box," catering to various electronic engineering designs, educational experiments, and test trimming needs. Flexible Resistance Range Setting: Easily adjust resistance from 1R to 9999999R, providing the flexibility needed for a wide range of applications. Precise Step Accuracy: Achieve precise adjustments with 1R step accuracy, ensuring accurate and reliable results for electronic engineering designs and educational experiments. Programmable Resistance: Enjoy the flexibility of programmable resistance from 0 to 9,999,999 ohms, with 1 ohm per step, catering to diverse electronic engineering applications. High Voltage Tolerance: With a maximum working voltage of DC200V and resistance tolerance of +/-1%, this resistor board ensures safety and reliability for various electronic engineering projects. Specification: Condition: 100% Brand New Item Type: Resistor Board Material: Glass Fiber Size: Approx. 9 x 3.5 x 1cm / 3.5 x 1.4 x 0.4in Specification: 1/2 watt tolerance Programmable Resistance: 0 to 9999999 ohms, 1 ohm per step. Resistance Tolerance: +/-1% Rated Power: 1/2 watt. Maximum Working Voltage: DC200V Package List: 1 x Resistor Board Package List 1 x Resistor Board