4-in-1 FUNCTION: Antifreeze refractometer is great tool to help you check freezing point of automobile antifreeze system, quick reference of battery acid charge condition, monitor DEF concentration and windshield water fluid status
DURABLE Refractometer - Antifreeze tester is made of non-staining aluminum and ABS rubber, anti-rust, resistant to abrasion, anti-dirt and easy to maintenance
EASY TO USE: Just 2 or 3 drops of solution on refractometer's prism, towards light, then get the accurate reading by looking through eyepiece
ATC FUNCTION: Antifreeze testers features automatic temperature compensate function from 10 ℃ to 30℃, excellent eliminate the deviation, reading directly, and allow to get accurate reading easy and fast
