SAFE&USEFUL---The unit is Mini Pen Liquid Moisture Water Tester Tool. Check the health status of DOT3, DOT4, DOT5 car brake fluid, it will be safer for your driving.
5 LED INDICATORS---5 LED to indicate percentage of water in the brake fluid with three colors green yellow and red. Even in the dark does not affect reading, make reading data easier.
EASY TO USE---The brake fluid tester is easy to use. Check the quality of brake fluid in car only takes seconds. Make it easier to operate for beginner. It's a must-have car tool for your car owners.
PORTABLE&DURABLE---Brake fluid tester pen is small compact size, easy to carry. Super strong ABS shell, has long service life.
AUTO TURN OFF---In order to save power, this test pen has the automatic shutdown function, it will automatically turn off the power 15 seconds after starting every time.