RHFN-30ATC is an upgraded version of RHF-30ATC with an additional features of BUILT-IN CALIBRATION KNOB, has much LIGHTER WEIGHT, and LONGER This model is specially developed for the measuring of the water concentration in honey. Guarantee: Offer 90 days warranty Specifications:Measuring Range: 10%-30%waterResolution Factor: 0.2%water Focus is adjustable and can be controlled manuallyComes with a non-roll standWith much lighter weight and longerEquipped with dual-scale measurement which provides direct readingHigh quality and accurate testing results are guaranteedApproved by strict quality and safety standardsDurable, Heavy-duty and lightweight with its aluminum constructionMade with the highest and finest quality of aluminum & rubberCushioned with soft & comfortable non-slip rubber Accessories included: 1pc Pipette ***Operations manual***Mini-screw driver***Soft protective carrying case