Welcome to the store! Each value corresponds to a separate inductor, no series or parallel connection. Inductor tolerance +/-10%. With 4mm banana connectors, easy to connect wires. Programmable Inductance: 1uH to 2.2mH, E12 standard total 40 values. This is an "inductance substitution box", a good and inexpensive alternative solution, capable of flexibly and quickly setting the inductance range from 1uH to 2.2mH, E12 standard total 40 values. Excellent applications for educational experiments, electronic engineering design, or test trimming. Color: Material: PCB + Electronic Components Factory batches have different screen printing numbers, which does not affect the use. Package Contents: 1 x Programmable Inductor Board Only the above package content, other products are not included. Note: Light reflections and different displays may cause the color of the item in the picture to differ slightly from the real one. The allowed measurement error is +/- 1-3 cm. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!