Coolant refractometer ( ATD-3705) from ATD ensures to meet the performance and durability professional mechanics demand with its high-quality tools at a competitive price. This high-quality refractometer offers a fast, easy way to test the freezing point of coolant/anti-freeze. It also determines the battery life by measuring the battery acid gravity. Other useful features of this tool are the automatic temperature compensation, easy-to-read graphics, and high-contrast lens. The viewfinder is also adjustable, and it has rugged, steel-body construction. Range: Ethylene Glycol: -84 degreeF to 32 degreeF Propylene Glycol: -60 degreeF to 32 degreeF Battery: 1.100-1.400 Specific Gravity Minimum Division: Ethylene Glycol: 5 degreeF Propylene Glycol: 5 degreeF Battery: 0.01 Specific Gravity Accuracy: Ethylene Glycol: 5 degreeF Propylene Glycol: 5 degreeF Battery: 0.01 Specific Gravity Key Features: Suitable to work with Ethylene or Propylene Glycol antifreeze and not to be used with OAT coolants of DEF. It includes a storage case, fluid dropper, cleaning cloth, and mini screwdriver. Specifications: Brand: ATD Tools, Inc. SKU: ATD-3705 Weight: 0.75 LBS