Car Detector Brake Fluid Tester Pen 5 LED Auto Vehicle Testing Tool Diagnostic Tool Brake Tester f/ DOT/3/4/5

Warm Tips: This product will be shipped on 2018-02-23 because of the Chinese Spring Festival. Thanks for your purchase and support. 5 LEDs indicating the water % in the brake fluid: 0% light indicates that the battery is OK, no replacement 1% light indicates that moisture content of brake oil less than 1% , brake fluid has a good performance, and ease of use. 2% light indicates that moisture content of brake oil less than 2%, brake fluid can be continued to use 3% light indicates that moisture content of brake oil less than 3% , proposed to replace brake fluid. 4% light indicates that moisture content of brake oil less than 4%, brake fluid should be replaced immediately. Size: Approx. 15cm/5.9″ Power Supply: 1 x 1.5V “AAA” Battery (Battery not Included)