Features Cost-Effective Resistance Solution: This resistor board offers an affordable alternative for various electronic applications, making it ideal for both professionals and hobbyists Flexible Resistance Range: Set resistance values quickly and easily, ranging from 1R to 9999999R, to accommodate diverse project requirements High Precision Accuracy: Enjoy a step accuracy of 1R, perfectly suited for educational experiments and electronic engineering designs Programmable Functionality: Achieve precise control with programmable resistance from 0 to 9,999,999 ohms, allowing for detailed testing and calibration Robust Voltage Capacity: Designed to handle a maximum working voltage of DC200V with a tolerance of +/- 1%, ensuring reliable performance in demanding conditions Features: 1、This is "resistance substitution box" good low？cost alternative solution. 2、Can flexible and quick setting resistance range from 1R to 9999999R. 3、Step accuracy 1R. for educational experiments, electronic engineering designs or test trimming are excellent applications. 4、Programmable Resistance: 0 to 9,999,999 ohm, 1 ohm per step. 5、Maximum working voltage DC200V, resistance tolerance: +/？1%. Specification: Condition: 100% 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