?9999 Counts True RMS Multimeter? This TRMS 9999 counts auto-ranging multimeter can measure temperature, capacitance, diode, continuity, NCV (non-contact AC voltage detection), Ohm, Hz, duty cycle, AC/DC voltage, AC/DC current, etc. ?Manual & Auto Mode Integrated Design? Not only suitable for traditional manual switching operation, also suitable for beginners' no-switching operation. User-friendly. ?Intelligent Recognition and Alert? When the test leads inserted in wrong way, it will displays "LEAD"; if the fuse is blown, It will prompt FUSE on the screen and beep alarm ?VFC Function? VFC function can measure the output voltage of inverters ?Wide Application? The multimeter is fully functional and suitable for a wide range of measurement applications. Such as: electronic laboratory, electrical equipment.