1. 3in1 Function: This multimeter combines perpetual calendar, temperature and humidity sensing with standard multimeter functions. It can display date and time synchronously while in use, and the perpetual calendar remains on after power off. 2. MultiFunction: Measures AC and DC voltage, AC and DC current, capacitance, frequency, continuity, diode test, and temperature. 3. Definition Large Screen: The backlit LCD provides clear readings with large digits, readable in day or night and suitable for a variety of work environments. 4. Hidden Support Frame: The vertical support frame allows angle adjustment after pulling out the stands, provides steady placement, and is easy to carry and position. Use scenarios Home electrical troubleshooting: Test voltages and currents in outlets and devices, check continuity and diode health, while monitoring ambient temperature and humidity. HVAC installation and maintenance: Verify control wiring voltages, monitor temperature and humidity, and diagnose circuits with the meter. Automotive electrical diagnostics: Inspect vehicle circuits for voltage and continuity, measure capacitance and frequency in relevant sensors, with readings shown on the large screen.