A. True RMS conversion: True RMS conversion can avoid the influence of waveform distortion on measurement, enabling relatively high-precision measurement, and the chip can perform self-calibration. B. Non-contact voltage testing (V~Alert): It has a non-contact detection function, allowing detection without touching any wires and reducing the risk of electric shock. C. Temperature measurement function: It can be used for HVAC system inspection and supports Celsius/Fahrenheit display. D. Automatic screen backlight: Users can operate normally in a dark environment. E. Advantages: It has functions such as AC/DC voltage, AC/DC current, resistance, diode testing/continuity, non-contact voltage, true RMS, temperature, frequency/duty cycle, and capacitance measurement, as well as features like automatic shutdown, data hold, and backlight.