Otc 4598 Electronic Brake Fluid Tester

features and benefits: fast 1 second test time color led display of test results automatic shut off pen style design easily fits most master cylinder fill ports tester determines quality of brake fluid one battery included: 1.5v aaa. directions for use: 1. Remove cap from brake fluid reservoir. 2. Remove probe cap from brake fluid tester. 3. Press power button on top of tester. Green led lights up. 4. Dip entire length of metal probes into brake fluid. 5. After one second, match color of leds with color chart to determine brake fluid quality. Tester automatically powers off after twelve seconds of inactivity.