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MUCAR Brake Fluid Liquid Oil Moisture Tester Pen Car Testing Tool For DOT3 DOT4Brake 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. 1. How Dangerous of a bad quality Brake Fluid ? 1) The inferior brake fluid causes the brake failure easily,thereby lead to a accident 2) The Brake fluid is related to the life of Brade pads, if doesn't take it seriously, the life of brake pads is worried. Good or Bad Distinguish accurately Our Brake Fluid tester designs 4 level digital led indicator that can provide the accurate water content for you. Functions: 1.check the car brake oil quality 2.5 LED lights display the percentage of moisture content in brake fluid,how the test results more accurate 3.Press the button for power on, green LED will light up. 4.Insert the tester into reservoir for a second , then the results will be indicated correctly by LEDs. 5.Testing for DOT 3, DOT4, DOT5 brake fluid 6.Auto power off, Supports 1 LR03 AAA batteries (Battery not included) Accurate To 1% For TESTThe Metrics is accurate to 1%, it can help you to know the situation of Brake Fkuid more clearly 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. How to use Brake fluid tester ? Step 1 : Open car's front cover Step 2 : Find the brake Oil tank mouth Step 3 :Dip test probes and read the Led lights Step 4: Recover the car's front coverPackage List: 1 x a brake fluid tester (Battery not included) To Check Fluid Quality:Press the button for power on, green LED will light up.Insert the tester into reservoir for a second, then the results will be indicated correctly by LEDs.Auto power off . Indications:Green: Battery OK, i.e.: No Water Contained in the Brake FluidYellow: Less than 1% of Water Content in Brake FluidYellow/Yellow: Approximately 2% of Water Content in Brake FluidYellow/Yellow/Red: Approximately 3% of Water Content in Brake Fluid; The Brake Fluid Should be ChangedYellow/Yellow/Red/Red: at least 4% of Water Content in Brake Fluid; The Brake Fluid Must be Changed Urgently, Extreme Danger .Notice* Please replace battery if the Green LED does not light up after you press button power.* Wash the test probe with tap water after use.* If you skin or clothing contacted with fluid, please use the water to wash. * Do not expose brake fluid to the atmosphere for a long time as the fluid is highly hygroscopic!* The monitors differ from one to another, the picture is only for reference, please make the object as the standard. PaymentDelivery detailsReturn detailsAbout usContact usPaymentWe accept the following payment methods To ensure that your items can be delivered as soon as possible, please fill in your payment information accurately！ Thank youDelivery details All the products in my shop have local warehouses in the United States, Britain, France, Germany, and Australia. U.S. warehouses: They are located in two warehouses in New Jersey and California, both of which can be shipped within 1 day and delivered within 5 days. Australian warehouse: located in Sydney, we use Australia Post or fastways express delivery, and the products can be delivered within 3-7 days. UK warehouse, with self-built warehouse in Wolverhampton and stock in official ebayg warehouse, both can be delivered within 2 days . German warehouse, we use eBay official warehouse, there is sufficient inventory, and can be sent to 28 EU countries. It can be shipped the same day the order is placed, and delivered within two days within Germany. Return details We accept the following return methods Returns are accepted within 30 days of buyer receiving the item. (Does not include man-made damage or misuse). 100% Money Back Guarantee! All products will be 100% tested before shipping. Buyer has up to 30 days from date of receipt for replacement if item is defective due to postage handling. All shipping costs for returned products are paid by the seller, please contact us for the return address For any questions about defects, returns, item exchange requests, please contact us and send us a message before opening any kind of case or request. We are committed to making every customer 100% satisfied and solving any problems. We highly value and appreciate your business. Thanks. Returns are accepted within 30 days of delivery. Returned items must be in new, unaltered and resalable condition. Seller is not responsible for any labor costs, dealer store fees, or damage caused by incorrect installation.About us THINKCAR has an intelligent production workshop, which covers an area of more than 3,500 square meters, is equipped with a fully automatic packaging production line, and has intelligent warehouse management. THINKCAR products have gone through more than 50 production processes, passed 2 meters, 3 meters and other height drop tests, -4℉-140℉ high and low temperature tests, 8 hours vibration test, 1000 plug-in tests, 1000 circular wire throwing tests, Continuous working test for more than 48 hours, real vehicle test of more than 100 car brands, including most popular models in Europe, America and Asia. As the official store of Thinkcar, all products are 100% original products. THINKCAR is a company specializing in automotive diagnostic tools, committed to providing quality products and services. Contact us（1） We maintain high standards of excellence 5 Star feedback and strive for 100% Customer satisfaction. Please do not hesitate to leave us your positive feedback if you are satisfaction with our products ,delivery or services .（2）If you have any questions about our products or services, Please Contact usimmediately before you leave Neutral or Negative feedback,So that we can satisfactorily address your concerns. We will reply you within 12 hours, except on Weekends and Holidays.（3）If you have any needs for products, please contact us ,we’ll do our best solve with you . 4Solve any problems with you in friendly way after communication. Refund or Replacement will be provided as you like.