LCD display, with 1, 999 counts
Tests air ions generator and air purifier(both positive ion & negative ion can be tested)
Tests the textile or cloth: Judge the ion's polarity and get the ion concentration
Small & light, can be hung as a necklace
Range: 1 x 104 to 1, 999 x 107 (ions/cm3)
Powered by LR44 button size battery
Dimensions: 78 x 27 x 9mm