Car Brake Fluid Tester 5 Leds Indicator Car Diagnostic Tools For DOT3/DOT4/DOT5 Digital Oil Quality Detector Car Tool Note: 1After every testing,you need clean the test head with dry cloth or paper. 2Due to the cause of international air transport, we will not provide the battery . Product Introduce: The brake fluid tester is suitable for determining brake fluid quality. Brake Fluid Tester is according to the variation of electrical conductivity to determine the moisture content of the brake fluid change.It through the light-emitting diodes clearly shows the degree of moisture. High content moisture will reducing the boiling point, and then affect the braking performance. Red indicates brake fluid need to be replaced immediately, green indicates brake fluid in good condition, yellow indicates brake fluid stays good, but is going to change. Designed without cable connector Fast and convevient Power supply: 1.5V "AAA" x 1 Suitable for DOT3 / DOT4 testing Directions for using: 5 LEDs indicating the water % in the brake fluid : 0% LED:there is on water content in brake fluid 1% LED: Water Content, H2O1%, brake fluid is above standard 2% LED: Water Content, H2O2%, still can use it 3% LED: Water Content Water Content, H2O3%, brake fluid should be changed 4% LED: Water Content Water Content, H2O4%, brake fluid must be changed Packing List: 1 x Brake fluid tester 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 cover _x000D_ _x000D_