Car Brake Fluid Tester Pen For Water Moisture Compact Tool Indicator DOT 3 / 4. 

Description: 

1. Size: Approx. 15cm/5.9"

2. Power Supply: 1 x 1.5V "AAA" Battery (Battery not Included)

3. Principle: according to conductivity changes to determine moisture change in brake fluid, with five different color      LED indicator

 Indicator Description:

 1.5 LEDs indicating the water % in the brake fluid:

 2.0% light indicates that the battery is OK, no replacement

 3.1% light indicates that moisture content of brake oil less than 1% , brake fluid has a good performance, and ease of use.

 4.2% light indicates that moisture content of brake oil less than 2%, brake fluid can be continued to use

 5.3% light indicates that moisture content of brake oil less than 3% , proposed to replace brake fluid.

 6.4% light indicates that moisture content of brake oil less than 4%, brake fluid should be replaced immediately.

 7.Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item.   Thanks for your understanding.

Package Included:

1 x Brake Fluid Test