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. 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% New Item Type: Frequency Tester 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. . Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin