1. This kit is a multi-functional measuring instrument based on 51 single-chip microcomputer design, which integrates capacitance measurement, inductance measurement and frequency measurement. It can measure non- capacitors, electrolytic capacitors, inductors and frequencies. 2. Practice making DIY welding of parts, learn to understand the application of microcontroller knowledge and the measurement principles of frequency, capacitance and inductance. 3. High-definition liquid crystal display, large LCD display, digital symbols show clearly, easy to read. 4. With multifunctional rotary gear, you can choose different functions, measurement is more convenient. 5. Can measure non-polarized capacitance, polarized electrolytic capacitance, inductance and frequency. Supply voltage: USB power supply DC 5V (DC power holder) Measuring range of non-polarized capacitance: 1pF-2200pF Polarized capacitance measurement range: 1uF-12000uF Inductance measurement range: 1uH-1H Frequency measurement range: 20Hz-400KHz Usage tips: 1. The power supply voltage of the kit is 5V DC voltage. Try to use a power supply with less noise and stable output. 2. Before each power-on, all switches must be popped up, and the display be displayed about 2 seconds after power-on. 3. After the display, before installing the shell, adjust the potentiometer so that the voltage between the 4th and 5th pins of LM393 is 3.16V. 4. When measuring non- capacitors and inductors, the positive and negative poles are not distinguished. The frequency and electrolytic capacitors must distinguish the positive and negative poles. The contact must be confirmed to be good. 5. The decimals of the readings are not rounded or virtualized. It is normal for all decimals to jump Note: Different batchesmay have different silk screen printing/appearance, which not affect the use. Shipping in disassembled, requires assembly before use. Colour:Blue & Transparent Material:PCB+electronic components+acrylic Package Contents: 1 * Capacitance Inductance Tester DIY kit 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.