5 LED Car Brake Fluid detector Electronic Pen Liquid water Moisture Tester BLT001

This convenient brake fluid tester is designed without cable connector.       Use 3A battery(included in this slide card), this tester allow you work distant       limit free and don't need to worry about your swirly line.       Check oil fluid concentration precisely       Tester has auto-off function       Demo Illustration for testing oil fluid concentration: Quickly determine percentage of moisture in brake fluid Measurement range: brake fluid (DOT 4) Power supply: 1.5V "AAA" x 1 5 LEDs indicating the water % in the brake fluid CE and RoHS approval Calibrated for DOT 4 fluid only Simply and easily determines the brake fluid quality GREEN LED:       Indicate that oil fluid contains       less than 1.5% water       = OK  YELLOW LED:       Indicate that oil fluid contains       appx. 1.5 ~ 3.0 % water       = MARGINAL RED LED:       Indicate that oil fluid contains       over 3%% water       = FAIL