1.100% Brand new and high quality 2.Small, exquisite workmanship, long service life. 3.Clear display, easy to use. 4.High accuracy, and stable working performance 5.LED Display meter has wide measurement range of 20-75Hz Specification: Model: ST16HZ Measurement range :20-75 (Hz) Accuracy :±2% Input signal amplitude :80-500 (V) Applicable: circuit frequency measurement Color: red, white, blue, green,yellow(Optional) Weight: Approx.19g~21g/0.7oz~0.7oz Package list: 1 × LED Hz Indicator