This dual-purpose handheld tester checks both battery acid specific gravity (1.15-1.30) and antifreeze/coolant freezing point for ethylene and propylene glycol mixtures, ideal for automotive service and fleet maintenance. It reads down to -50C (roughly -58F) and includes automatic temperature compensation for accurate results across a 10-30C ambient range. A calibration screwdriver, cleaning cloth, sample applicator, and hard case are included.