ITEM NAME:Car Brake Fluid Oil Tester Detection Pen with 5 LED Testing indicator Tool A1E9 Product Description Specifications: 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, 1x LR03 AAA batteries (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.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. 1 x Detection Pen. 1, the green LED lights = water content in the brake fluid H2O
