Brake Fluid Tester Pen for DOT 3, DOT 4, DOT 5.1, with 5 LED Indicators

This brake fluid liquid tester pen is mainly used for checking the health of your car's brake fluid, providing you with more accurate test results. What's more, it can remind you to change the brake fluid when necessary, which can effectively avoid traffic accidents.

The tester is made of high-quality brass-plated metal, which offers good oil resistance and corrosion resistance, allowing for long-term usage. The case is frosted with a good anti-slip design, making it less prone to slipping when in use.

The water content in the brake fluid is indicated by the number of LED lights on the test pen. A red light indicates that the brake fluid needs to be changed, a green light indicates that the brake fluid is in good condition, and a yellow light indicates that the brake fluid is in fair condition.

This tester is suitable for testing the moisture content in DOT-3, DOT-4, and DOT-5.1 brake fluids. It is compatible with AAA batteries, but please note that batteries are not included in the package. To open the battery cover, follow the direction of the arrow on the test pen.

To use the tester, first, unscrew the brake fluid reservoir and then pull off the brake fluid tester cap. Second, press the button to power on, and the green LED will light up. Third, insert the tester into the reservoir for one second, and the test result will be correctly indicated by the LED lights. Finally, press the button again to power off.

Warm Tips: - If the green LED does not light up when the power button is pressed for a long time, the batteries need to be replaced. - Please wash the test probe with clean water after each use. - Do not expose the brake fluid to the air for a long time, as brake fluid is highly absorbent.

Specification: - Material: Brass-Plated Metal - Quantity: 1 PCS - Color: Black - Weight: 27 g - Size: 5.98 × 0.78 inches - Voltage: 9-15 V - Feature: Practical, Safe, Portable - Fit Type: Universal Fit

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