ITEM NAME:Car Vehicle Brake Fluid Tester Pen w/ LED Indicator for DOT 5.1 4 3 Brake Fluid Product Description Description: Car Brake Fluid Tester LED Indicator Universal Auto Vehicle DOT 5.1 4 3 Brake Fluid Quality Check Pen Description: The brake fluid tester pen determines the change of brake fluid moisture according to the change of conductivity. It clearly shows the degree of moisture contained in the light-emitting diode, high moisture content will cause a lower boiling point and affect braking performance. Feature: 1. Check the quality of car brake fluid 2. 5 LED lights show the percentage of water in the brake fluid 3. Automatic shutdown 4..Red LED light = H2O in brake fluid> 3%, brake fluid cannot be used continuously and needs to be replaced. Red LED: Replace brake fluid. Green LED indicator = H2O in brake fluid
