Taxutor 2pcs Brake Fluid Tester Pen Hydraulic Fluid/Liquid/Oil Moisture Analyzer with 5 LED Indicators, Auto Brake Diagnostic Testing Tool for DOT3 DOT4 Brake Fluid

Attention Replace battery if the green LED not light up any longer after you press power on button . Wash the test probe with tap water after every use. Do not expose brake fluid to the atmosphere for a long time as the fluid is highly hygroscopic! In case of skin contact with brake fluid, thoroughly wash the affected skin or clothing with water. Green/Yellow/yellow/red: Approx.3% of water content in brake fluid. The brake fluid should be changed. Green/Yellow/yellow/red/red: At least 4% of water content in brake fluid. The brake fluid must be changed urgently! Extreme danger!