Product introduction:Brake oil testing pen is used to measure the moisture change of brake oil according to the change of electrical conductivity. It clearly shows the degree of water content through light-emitting diodes. High water content will lead to lower boiling point, affect braking performance, and corrode brake master cylinder and sub-cylinder, leading to rust and seizure. Red light indicates that the brake oil needs to be replaced immediately, green light indicates that it is in good condition, and yellow light indicates that it is in good condition, but it will be replaced soon. The product operation is simple, accurate and fast!Detailed explanation of the meaning of indicator light:Green: the battery is OK, that is, there is no water in the brake oil.Green/yellow: the water content in brake oil is less than 1%, and the brake oil has good performance and can be used safely.Green/yellow/yellow: The water content in brake oil is about 2%, and the brake oil can be used continuously.Green/yellow/yellow/red: The water content in brake oil is about 3%, so it is recommended to replace the brake oil.Green/yellow/yellow/red/red: The water content in the brake oil is at least 4%, and the brake oil needs to be replaced immediately.Tips: After each test, wipe the liquid part of the test point with a dry cloth or paper.Item code: C-JCB-BK