DUOYI DY23D Car Brake Fluid Detection Pen with Print Function 1. This is a car brake fluid tester with a printer. It tests the water content of the brake fluid to determine if it needs to be changed. 2. Built-in printer prints the test report, which is convenient for technicians to know the brake fluid status in detail from the car owner. 3. 12V automotive battery power supply 4. Equipped with high precision probe and easy operation printer, this automotive high-end technology brake fluid tester is a must have tool in automotive repair industry. 5. Power Supply: DC 9V - 24V 6. Operation Temperature: 0-50 degree Celsius Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store