**Product Description: Compact Pen Style Brake Fluid Tester for Quick Diagnostics** - **Pen Style Brake Fluid Tester**: This innovative brake fluid tester pen is designed to efficiently detect the condition of DOT‑4 and most synthetic brake fluids. Its fast and effective testing process makes it a must-have tool for any vehicle owner or professional mechanic. - **Immediate Test Result Display**: Equipped with diode indicators, this tester provides instant results with clear color-coded feedback: green indicates less than 1.5% water content, yellow signals 1.5‑3%, and red alerts to more than 3%, suggesting the need for fluid replacement. This immediate feedback ensures you can quickly assess the condition of your brake fluid. - **Portable and Compact Design**: The tester's well-structured case fits comfortably in your hand, making it easy to carry and use on the go. Its compact size ensures it won't take up much space in your toolbox or travel kit, offering convenience without compromise. - **Wide Applicability**: Suitable for checking the condition of DOT‑4 and most synthetic brake fluids, this tester is widely applicable in private workshops, repair shops, and car dealerships. It's a versatile tool that meets the demands of various professional environments. - **Universal Compatibility**: Designed for use with most vehicles, the automotive brake fluid tester accurately and efficiently tests DOT4 brake fluid, ensuring your vehicle's brake system is in optimal condition. Upgrade your diagnostic tools with this pen style brake fluid tester, combining portability, efficiency, and universal compatibility. Its immediate results and compact design make it an essential tool for ensuring vehicle safety and performance.