Features Easy Installation: The frequency indicator adopts exquisite craftsmanship, easy to install, very convenient and practical, with a wide operating voltage range of 100~380V, which can be used in various circuits. Excellent Performance: The LED indication light is well-made, improved to improve durability, not easy to rust, stable in structure and performance, and long in service life. Good Practicability: The frequency indicator is well-made, compact in design, small in size, light in weight, easy to carry and store, can measure frequency accurately, and is a practical tool accessory. LED Digital Display: This square digital display LED indication light adopts LED indicator light and digital display design, which makes the frequency reading clearer and more intuitive, and is a good helper for your work. Five Colors: There is 1 indicator light in the package, the frequency measurement range is 20~75Hz, and five colors of white, red, yellow, blue and green are available for you to choose to meet your needs. Specification: Color:White/Red/Yellow/Blue/Green(Optional) Working Voltage:100~380VAC  Frequency Measuring Range:20~75Hz Package List: 1 x Indicator 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. Package List