1R - 9999999R Adjustable Seven Decade Programmable Resistor Board Step 1R 1% 1/2 Watt Descriptions: This is "resistance substitution box" good low-cost alternative solution, can flexible and quick setting resistance range from 1R to 9999999R, step accuracy 1R. for educational experiments, electronic engineering design or test trimming are excellent applications. Features: Design based on "resistors series" theorem. 1/2 watt tolerance +/-1% SMD resistors. High quality FR4 glass fiber PCB. With spare parts 7 pieces jumper caps Programmable Resistance: 0 to 9,999,999 ohm, 1 ohm per step. Resistance Tolerance: +/-1% Rated Power: 1/2 Watt. Max. Working Voltage: 200V. No retail package Package: 1 x Programmable 1R - 9999999R Resistor Board