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 focusthe scale clear.5. Soft eyepiece gives you great comfort while viewing.6. No batteries or power supply are required.Specification:Model: RZ115MeasurementRange:EthyleneGlycol: -50 ~ 0PropyleneGlycol: -50 ~ 0CleaningFluid: -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 * MiniScrew Driver1 * WipingClothNote: 1. Due to the difference between monitorsand light effect, the pictures may not reflect the actual color of the item. Pleasetake the real one as standard.2. Please allow slight error due to manualmeasurement. 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..