Feature:1. This is "resistance substitution box" good lowcost 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% Brand NewItem Type: Resistor BoardMaterial: Glass Fiber Size: Approx. 9 x 3.5 x 1cm / 3.5 x 1.4 x 0.4inSpecification: 1/2 watt toleranceProgrammable 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