DATA STORAGE: With the function of storing data after power failure, there is no need to worry about losing data with our AC multimeter. The memory data is for 10 years. 8 IN 1 METER: Voltage V, current A, temperature ℃, power factor PF, power KW, time HD, frequency Hz, electrical energy KWH, multifunctional display, meeting various needs. WIDE USAGE: This energy monitor can be used as ammeter, digital voltmeter, power meter and battery capacity monitor. Suitable for various batteries, such as acid batteries, lithium batteries. FAST AND ACCURATE: Adopt 32 bit microcontroller, the AC power meter has rapid response speed, equipped with precise current transformer for accurate calculation. CLEAR LCD DISPLAY: Regardless of day or night, indoors or outdoors, or even in sunlight, users can clearly see the displayed content through this clear color LCD screen.