Feature 1Quick and Convenient: One click test, which can simplify the complexity. It only takes 3s to get the results. It is simple to use and widely used. 2Bottom Display: The bottom of the digital refractometer is designed to hang ropes, which is convenient for carrying. 3Prism Column Dustproof Design: The prism column is provided with a protective cover to prevent dust from entering. 4AAA Battery: The digital refractometer uses a AAA battery. It will automatically shut down when there is no operation. 5Widely Used: Digital refractometer has a large LCD screen, small and portable, and suitable for many scenes.Item Type:DigitalRefractometerMaterial: ABSColor: As Pictures ShownWeight: Approx. 362g / 12.8ozProduct Size: Approx. 12.4x6.2x3.4cm / 4.9x2.4x1.3inPower Supply: 1 AAA Dry Battery 1.5V (Shipped Without Battery) Range Accuracy Resolution Refractive Index 1.3330~1.4200 0.0003 0.0001 1.3330~1.5177 0.0003 0.0001 Temperature 0.0~40.0C 0.5C 0.1C 32.0~104.0F 0.9F 0.1F .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Refractometer1 x Manual1 x Straw1 x Screwdriver1 x Box1 x Wipe