Multiple Advantages: It has the advantages of convenient meter reading, high reliability, small volume, light weight, beautiful appearance, advanced technology 3 Phase Ac Measurement: This meter is suitable for the measure the single-phase AC efficient electrical energy of rated frequency 50Hz,used for fixed installation indoors Applicable Environment: Apply to the environment temperature is less than - 25 ℃ ~ + 55 ℃, relative humidity is not more than 95%, and in the air without corrosive gases and avoid dust, mold, salt fog, condensation, insects, etc Powerful Function: It has good anti-electromagnetic interference, low power consumption, high Accuracy, high overload, high stability, anti - theft and long life, installation of 35mm DIN standard guide rail VIP Service: If you are not satisfied with the quality of the product, pls feel to contact us and let us know about the issue, you will be assisted ASAP, customer satisfaction is on our priority., Weight: 0.62 Pounds, Manufacturer: Walfront