Features： 1、The brake fluid tester, with a high‑precision sensor, has accurate detection results, can effectively detect the state of the brake fluid, and provide you with a safer driving guarantee. 2、3‑color LED display, the status of level 5 brake fluid, the indicator light is green to show that the current brake oil is in good condition. When the yellow light is less than 1%, the brake oil can still work. When the light is red, the brake fluid The content is about 3%, it is recommended to replace the brake fluid. 3、The non‑slip design on both sides can be operated with one hand. The operation is simple and brings more convenience to your inspection work. Nickel‑plated metal probe, oil resistance, oxidation resistance, good conductivity, high precision, can be quickly measured. Universal probe, rugged, easy to use and flexible. 4、Widely used and supports different brake pads of DOT3, DOT4 and DOT5.1. Simple but practical, single button with multiple functions. Press and hold for 3 seconds to turn on/off, press and hold for 2 seconds to turn on/off the flashlight, press once to select the oil type. 5、Made of high quality industrial grade ABS material, durable, not easy to wear, has long service life, suitable for all car inspections, bringing you more convenience. Specification： Condiiton: 100% Brand New Item Type: Brake Fluid Tester Material: Industrail Grade ABS  Color: Black. Display: Three-Color Led Display Power Supply Battery: 2 x AAA Battery (Not Included) Detection Range: DOT3, DOT4, DOT5, DOT5.1 Working Temperature: 0-50℃ Product Size: Approx. 171 x 39 x 22mm/6.7 x 1.5 x 0.9in   Product Weight: Approx. 71g/0.2lb Vehicles Used: All Vehicles Instruction:  How much do you know about brake fluid? All drivers know how important brake fluid is when driving, and it is directly related to vehicle safety and personal safety, which is why the automotive industry. This is why many people describe brake fluid as a "security guard". The general brake fluid replacement cycle is 2 years. Brake fluid itself is very absorbent, and will absorb moisture in the surrounding air, such as car wash, humid air, etc. Which will directly cause the quality of the brake fluid to decline and may lead to accidents. Such as rear accident, vehicle runaway, traffic accident. BF 100 brake fluid teste descriptionr: Red brake fluid with a water content of at least 4% Red brake fluid with a water content of about 3% Yellow brake fluid with water content of about 2% Yellow: Brake oil with less than 1% water content Green: Anhydrous in good condition LED display description: Green: The current test brake fluid is in good condition. Green/Yellow: The water content of the brake fluid is less than 1%. The brake fluid has good performance and can be used with confidence. Green/Yellow/Yellow: Brake oil with a water content of about 2%, it can still work. Green/Yellow/Yellow/Red: The content of brake fluid is about 3%. It is recommended to replace the brake fluid. Green/yellow/yellow/red/red brake fluid, at least 4%, can be replaced. Package List： 1 x Brake Fluid Tester