The main function: 1. BF200 support DOT3, DOT4, DOT5.1 2. BF200 is with high precision sensor 3. BF200 supports mulit type Fluid test 4. BF200 is with replaceable battery design 5. BF200 is with Safe, fast, protable, easy,trust and accurate function. 6. BF200 is with screen Features Attention please: The package doesn't include battery, please buy batteries in your local market, thanks. Why does Brake Fluid Tester is essential tool? 1. What is brake fluid? Brake fluid is a type of hydraulic fluid used in hydraulic brake and hydrauli clutch applications in automobiles, motorcycles, light trucks, and some bicycles. 2. Take precautions and drive with peace of mind. After 1 year of use, the water content of brake oil will reach a higher level. When water content in brake oil reaches a certain level, the force will be weakened and distance will be extended. Advantages of BF200 1. Sound Alarm When moisture content of brake fluid is detected to exceed standard, alarm will be sounded to replace brake fluid. 2. LCD display test result to tell you quality of brake fluid. To DOT3: lower than 1% High Purity To DOT4: lower than 2% Status is acceptable To DOT5 .1: higher than 4% Need to Replace 3. High Resolution Screen Display clear test result even in dark night, as well as in brightest day. Color: Black and grey Material: ABS Size: 6.14x2.17x0.9inch Package Contents: 1 X Car Brake fluid detector test 1 X Manual Only above package content, other products are not included. Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is and- 1-3cm.