1.[Multi-functional Design]: This product combines inductance measurement, frequency measurement, polarized capacitance measurement, and non-polarized capacitance measurement to meet a variety of measurement needs. 2.[LCD Display]: Clear-definition LCD large screen display, digital symbols show clearly, easy to read, greatly improve the measurement efficiency. 3.[SW3 Self-locking Switch Function]: According to the different types of capacitance measurement, improve the measurement accuracy. When measuring nonpolarized capacitance, Sw3 switch is used to adjust; when measuring polarized capacitance, Sw3 is used to choose the measurement. 4.[DIY Soldering Set]: DIY soldering practice of loose parts can exercise the hands-on ability and help understand the use of microcontroller knowledge and the principle of frequency, capacitance, and inductance measurement.