Simultaneously monitors voltages and frequency with double display for efficient electrical systems LED display is displayed in digital direct reading mode, which is more intuitively and clear Widely used in substation automation, testing equipment, voltages regulators, inverters, voltages regulating motor equipment, and other occasions High stability, high reliability, low power consumption, small size, and installation Make from ABS flame retardant shell, not easily deformed, enduring, Manufacturer: Kaeltsyn