Digital Brake Fluid Tester Pen DOT3/4/5 5 LED Auto Car Oil Quality Check Tool

1× Brake Fluid Tester Pen. UNIVERSAL BRAKE FLUID TESTING – Works on all automotive brake fluids (excluding silicone-based DOT5.1). • Test fluid directly in reservoir – avoid air exposure. AUTO SHUTOFF & BATTERY CHECK – Powers off after 12s + green LED indicates battery status.

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