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.

• Design based on “resistors series” theorem.
• 1/2 watt tolerance +/-1% SMD resistors.
• Screw terminal block easy to connect wires.
• High quality FR4 glass fiber PCB.
• With spare parts 10 pieces jumper caps (on board 7 pieces, total 17 pieces).