• Check the health status of DOT3, DOT4 car brake fluid, Brake Fluid Tester Pen can be used as a digital brake fluid tester suitable for determining brake fluid quality.

• Press the button , Insert the tester into reservoir for one second then the tester result will be correctly indicated by LEDs. Repress the button for power off.

• 5 LED display lights the percentage of moisture content in the brake fluid, as the test results are more accurate

• Supports DOT3 DOT4 DOT5 brake fluid .

• Small size ,you can take it in pocket , take 1 AAA 1.5V battery. automatic shut down after about 15 seconds of inactivity

  1. the green LED lights = water content in the brake fluid H2O<1.5%, brake fluid qualified
  2. the yellow LED lights = brake fluid water content H2O = 1.5% to 3%, can continue to use, test again six months later
  3. the red LED lights = water content in the brake fluid H2O> 3%, can not continue to use the brake fluid needs to be replaced Red LED: change brake fluid
  4. LED red flashing: battery replacement
  5. LED yellow: low moisture content, check again in six months
  6. LED green: brake fluid lines / cell row

1. To check the quality of brake fluid quality

2. 5 LEDs to indicate percentage of water in the brake fluid
3. Automatically power off
4. Operated by a LR03 AAA 1.5V battery (Not included)

Technical parameters:
Green: Battery OK, that is, brake fluid does not contain water
Green / yellow: brake oil in water content of less than 1%, better brake fluid performance, ease of use.
Green / yellow / yellow: brake oil in water content of about 2%, brake fluid can continue to use.
Green / yellow / yellow / red: brake oil in water content of about 3%, the proposed replacement of brake fluid.
Green / yellow / yellow / red / red: brake oil in water content of at least 4%, the brake fluid must be replaced immediately responsible for very dangerous.