Review on Accurately Test Your Car'S Brake Fluid With Our High Precision Brake Fluid Detector - LCD Screen, Audible Alarm, Suitable For DOT3 DOT4 DOT5.1 Fluids by Andre Motko

I've had this tester for about a week now and have tested about 15 vehicles with it comparing it to my other typical methods. This tester was found to be accurate in my testing and works as advertised. Very easy to use the only thing you'll need is three AAA batteries to get going out of the box. Hold down the button to turn it on and then get testing. If you hit the button while on it will change between different brake fluid types, hold the button for a short time to turn on the LED and hold longer to turn off. Overall great tester for the money.