Mini Brake Fluid Liquid Tester Test Pen Auto Car Tool

Description:
According to the variation of electrical conductivity to determine the moisture content of the brake oil change.High moisture will lead to the boiling point is reduced, affect the braking performance
Meanings of indicator light:
Green: Battery OK, i.e.: No Water Contained in the Brake Fluid
Green / Yellow: Less than 1% of Water Content in Brake Fluid
Green / Yellow / Yellow: Approximately 2% of Water Content in Brake Fluid
Green / Yellow / Yellow / Red: Approximately 3% of Water Content in Brake Fluid; The Brake Fluid Should be Changed
Green / Yellow / Yellow / Red / Red: at least 4% of Water Content in Brake Fluid; The Brake Fluid Must be Changed Urgently, Extreme Danger . 
Note:
Remember to dry this tester before using in brake fluid.
Package Includes:
1 x Brake Fluid Test Pen(battery included)