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> Mini air tester test concentration of negative air ion
Mini air tester test concentration of negative air ion
Display concentration of positive and negative air ion
LCD Display: Max reading of 1999.
Test the texitile or cloth, judge the ion's polarity and concentration
Attention:don't touch the rear square metal of the tester when testing
Supplied by LR44 button size battery
The test range is between 1 X 104 to 1.999 X 107
Dimensions:78mm(L) x 27mm(W) x 9mm(H)
