5-In-1 Car Brake Fluid Tester Compatible with DOT 3, 4 and 5.1 5 LED Indicators for Easy Intuitive Reading, Automotive Diagnostic Pen, Universal Testing Tool

【Fast & Accurate Diagnostics】 This brake fluid tester delivers instant, precise results in just 10 seconds with a strict error margin within ±0.3%, accurately monitoring moisture levels to help you know exactly when fluid replacement is needed for driving safety 【5-in-1 Broad Compatibility】 This brake fluid tester tool accurately measures the moisture content of DOT3, DOT4, DOT5, DOT5.1 brake fluids, delivering reliable safety results for most cars, SUVs, and light vehicles 【5-LED Moisture Level Indicator】 This tester pen is fitted with five LED indicators, allowing you to see the condition of the brake fluid at a glance: green indicates that the fluid is in good condition, yellow indicates that attention is required, whilst red warns of excessive moisture content, requiring immediate replacement 【Durable & Reliable Build】 This portable car brake detector features a copper-plated metal probe that resists oil, oxidation, and corrosion, paired with a sturdy ABS housing to ensure long-term durability and safety 【Lightweight and Cpmpact】 This automotive brake diagnostic pen features a compact pen-style design measuring just 15 × 2 cm. Lightweight and easy to carry in a pocket or toolbox, it runs on 1 × AAA battery (not included), making it ideal for DIY users, garages, and mechanics