1,Screw terminal block is easy to connect wires, 1 percent resistance tolerance, rated power, 1 or 2 watt. 2,The resistance range can be set flexibly and quickly from 0.1R to 9999999R, with a step accuracy of 0.1R. 3,With 8 jumper covers programmable resistors, 0.1R to 9,999,99R, 0.1R per step. 4,Programmable resistance board can replace resistance box and is a more cost‑effective alternative solution. 5,Widely used in educational experiments, electronic engineering design or test trimming, and is an excellent application. Item Type: Programmable Resistor Board Material: FR4 Copper Clad Laminate Resistance Tolerance: and or - 1 percent Rated Power: 1 or 2 Watt Maximum Working Voltage: 200V Programmable Resistance: 0.1 to 9,999,999 Ohms, 1 Ohm Per Step Fixed Hole Center Distance: Approx. 100 x 33mm or 3.9 x 1.3in Fixed Hole Diameter: Approx. 3mm or 0.12in Board Thickness: Approx. 1.6mm or 0.06in 1 x Programmable Resistor Board Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.