... of high precision ,easy to use,high reaction speed and high cost performance.It is widely used in medicine, ... chemical,jewelry,oil,road construction,university and college,national defense and scientific research etc. AC and DC , unit conversion, counting ,which can meet ... amount of peeled3.Level 4 shockproof4.Counting function5.Unit conversion:carat,ounce,and gram to transform6.Lower part of the hook ...