Features:1. Aluminum body, sturdy and light weight.2. Automatic temperature compensation (ATC) function.3. Compact design with anti-slip rubber handle.4. Equipped with a manual calibration knob, you can rotate it to focus the scale clear.5. Soft eyepiece gives you great comfort while viewing.6. No batteries or power supply are required.Specification:Model: RZ115Measurement Range:Ethylene Glycol: -50 ~ 0Propylene Glycol: -50 ~ 0Cleaning Fluid: -40 ~ 0Battery Fluid: 1.10 - 1.40sgMaterial: Aluminum & ABSColor: Black + SilverSize: 156*40*40mm / 6.1*1.6*1.6inWeight: Approx. 236g/8.3ozPackage list:1 * Antifreeze Refractometer1 * Pipette1 * Mini Screw Driver1 * Wiping ClothNote:1. Due to the difference between monitors and light effect, the pictures may not reflect the actual color of the item. Please take the real one as standard.2. Please allow slight error due to manual measurement. Thanks for your understanding.3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.1Aluminum body, sturdy and light weight.2Automatic temperature compensation (ATC) function.3Compact design with anti-slip rubber handle.4Equipped with a manual calibration knob, you can rotate it to focus the scale clear.5Soft eyepiece gives you great comfort while viewing.