4.1 can show frequency by 7 segment display clearly better
4.2 can adjust the color of the tube Super Bright RGB LED which easy to observe 4.3
. There is a button to adjust the light intensity
4.4 have buttons to adjust the Duty Cycle
4.5 can adjust the height of the lamp has a
4.6 can measure frequency, minimum and maximum 3.5 250Hz
4.7 resolution 1 Hz
4.8 can display a decimal one position
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