Digital brake fluid pen tester which tests the amount of moisture in brake fluid and indicates if it is good or it requires replacement. 

Detect Range 0-4%
Error range ± 0.3%
Brake fluid types:DOT3,DOT4 and DOT5.1
Alarm Sound/Light
Backlight in red and green double colour
Signal intensity indication method
Sound from slow to fast
Display data of LCD is from low to high
Auto power off: no operation and no sensing signal will shut down automatically within in
about 5 minutes
Low-battery indication
Power supply 2 pcs 1.5V AAA Batteries