In summary, IT9121E power meters can provide maximum input of 1000V_RMS and 50A_RMS. It has a measurement bandwidth of 100kHz and can be easily used for measuring voltage, current, power, frequency, harmonics, and other parameters. The standard configuration includes USB, RS-232, and LAN communication, and USB-based peripheral device interfaces. Users can save the measured parameters into the external storage medium. The basic voltage and current accuracy are 0.1%. Moreover, the power meter has rich integrating functions, such as active power. Applications include tests of motors, household appliances, and UPS.