Features: Mainly used in industrial and mining enterprises, metallurgy, chemical, electric power, complete sets of equipment and various electronic control devices. Good stability and high measurement accuracy. Designed to measure voltage frequency in A.C. electrical power networks. Installed on the panel for the control system and power distribution systems. Compact shape and lightweight, convenient installation and easy to use. Specification: Condition: 100% Brand New Item Type: Frequency Tester Voltage: AC 380V Scale Range: 45-55Hz Accuracy: 1.5 Colour: Black Main Material: Plastic Package List: 1 x Frequency Tester 2 x Bracket 1 x User Manual Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.