Description:This is a digital brake fluid tester suitable for determining brake fluid quality. Quality is tested and indicated on five LEDs in terms of percent of water in the brake fluid. It is commonly for professional use in automotive repair or servicing shops.Features:Ideal tool for check brake fluid quality.5LEDs to indicate percentage of water in the brake fluid.Automatically power off.Press the button to turn on, the green LED will light up.Insert the tester into reservoir for one second then the test result will indicated by LEDs.Specifications:Material: Plastic + MetalColor: BlueType: LED(5LED)Battery: AAA ( NOT included)Package Weight: approx. 60gIndicator Function:Green: Battery OK, i.e.: No water contained in the brake fluidYellow: Less than 1% of water contain in brake fluidYellow/Yellow: 2% of water contain in brake fluidYellow/Yellow/Red: 3% of water contain in brake fluid. the brake fluid should be changedYellow/Yellow/Red/Red: at least 4% of water contain in brake fluid. the brake fluid must be changed urgently!Package Included:1x Brake Fluid Tester