FR2010E+ Smart double clamp phase voltmeter, is a high-quality, multi-functional, high-precision, intelligent, portable handheld measuring instrument designed for on-site measurement of voltage, current, power, power factor, frequency, and phase. Widely used in energy metering,electricity inspection, power inspection, power meter and relay protection, differential detection, start-up test, industrial and mining enterprises, scientific research institutions and other departments. Welcome and I wish you a happy life, my friend., Manufacturer: JOLIANE