1. The resistor board uses 0.1% precision resistors, not 1% ordinary resistors. 2. The resistor is plug-in, not patch. The distance between the two pins of the patch is small, moisture makes the resistance value smaller, and the stability is poor. 3. Instead of using a DIP switch, a gold-plated pin is used. The contact resistance of the DIP switch is too large, which affects the accuracy of the small resistance value. The contact resistance of the gold-plated pin is more than half smaller than that of the DIP switch. Name:8 Segment decimal programmable resistor board (one thousandth) Resistance range:0.1Ω-9.9999999MΩ Resistance power:0.25W Note:There are differences in the factory batch number silk screen, which does not affect the use. Colour:Purple Material:PCB+electronic components Package Contents: 1 * Resistance box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.