1[DIN Rail Voltmeter Ammeter] This voltage current meter could accurately monitor voltage (170 to 270V) and current (0 to 63A) in real time. 2[Easy to Install] Designed to be easily mounted on a rail, this voltage current meter is simple to install and convenient to maintain. 3[Safety Protection] Equipped with over temperature and over current power outage protection function, ensuring safe circuit operation. 4[Multiple Measurement Functions] This energy meter not only measures voltage and current, but also provides timing, power, temperature, frequency, and power factor measurements. 5[Reliable Construction] Made from premium ABS and PC materials, this voltmeter ammeter is built to withstand everyday wear and tear and provides long lasting performance.