["AC 100V 220V 380V Analog Panel Frequency Meter Tester Gauge for Hertz Indicator 45-55Hz\n\nFeatures:\nbrand new and high quality.\nUsed widely in the electronics, automatic control system, mechanical equipments, shipbuilding, aviation, etc.\nInstalled on the display panel and switch panel for the control system and power distribution systems.\nDesigned to measure frequency in A.C. electrical power system.\nBlack character, white background, square panel mount, analogue display.\n\nSpecifications:\nColor: white+black\nMaterial: plastic\nAccuracy class: 1.5\nVoltage: AC 220V\nFrequency: 45-55Hz\n\nNote:\nTransition: 1cm=10mm=0.39inch\nPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage Includes:\n1 × Analog Frequency Meter"]