1. Multi-functional Design: This device integrates inductance measurement, frequency measurement, polarized capacitance measurement, and non-polarized capacitance measurement to meet a variety of measurement needs. 2. LCD Display: Large, clear LCD screen with easily readable digital symbols, improving measurement efficiency. 3. SW3 Self-locking Switch Function: The SW3 switch enables selecting the appropriate mode for different capacitance types, improving measurement accuracy. When measuring non-polarized capacitance, SW3 selects the non-polarized mode; when measuring polarized capacitance, SW3 selects the polarized mode. 4. DIY Soldering Set: Includes loose parts for DIY soldering practice, which helps develop hands-on skills and teaches the use of microcontroller knowledge and the principles of frequency, capacitance, and inductance measurement.