Brake Fluid Tester 5 LED Mini Electronic Brake Fluid Liquid Automotive Tester Pen for Auto Car Vehicle Diagnostic Tool Black the new support DOT3, DOT4,DOT 5,Fashion Black & Luxury Blue, and with Tracking number.Ship way is China Post Air Mail. Description: The tester can be used as a digital brake fluid tester suitable for determining brake fluid quality.Developed for professional use in astomotive repair shops and in servicing.Quality is tested and included on five LEDs in terms of "per cent of water in the brake fluid". Check Fluid Quality Press the button for power on,green LED will light up.Insert the tester into reservoir for one second then the tester result will be correctly indicated by LEDs.Repress the button for power off. The tester will automatically power off after about 15 seconds of inactivity. Specification: 1.check the car brake oil quality 2.5 LED lights display the percentage of moisture content in brake fluid 3.auto power off 4.Supports 1 LR03 AAA batteries (Battery not included) Instructions: Brake fluid detection pen is based on the change in conductivity to determine the moisture change brake fluid. It shows clearly the extent of moisture contained by the light-emitting diode, high moisture content will lead to lower boiling point, affect braking performance. Red indicates the brake fluid needs immediate replacement, green represents good condition, yellow indicates the state is acceptable but soon replaced. Indicator Description: Green LED lights= water content in 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 Features: Five LED indicators show the test results more accurate. Testing DOT 3, DOT4brake fluid Press the switch to turn on the power, the green LED light that represents the battery properly, the green light does not shine on behalf To replace the battery Automatic shutdown Technical Parameters: Green: Battery OK, namely brake fluid does not contain water Green / yellow: brake oil in water content of less than 1%, good 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%, it is recommended to replace the brake fluid. Green / yellow / yellow / red / red: brake oil in water content of at least 4% must immediately replace the brake fluid is responsible for very dangerous. Note: After each test to use a dry cloth or paper to the liquid portion of the test point test clean Package Included: 1 x Brake Fluid Test Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.