Mini Air Ion Tester

This air ion tester is designed for testing negative & positive air ion concentration of air ion generator. With it you can estimate whether the air ion generator or air purifier operate in good state.
Features
Tiny shape with LCD panel
This tester is suit for all kinds of positive or negative air ion generator.
Test ion generator, air purifier, textile, cloth, etc.
Judge ion polarity and concentration.
It can be hung like a necklace used as decorations or packed in bags.
Test range: 1 x 104 ~ 1999 x 104 ions/cc.
Resolution: 1 x 104
Note: Don't touch the rear square metal of the tester in measuring.
Specifications
Color White
Power supply 4 x 1.5V LR 44 battery(included)
Dimension 7L x 3W x 1.2Hcm
Weight 50g
Package content 1 x Mini Air Ion Tester, 1 x User Manual