DiFluid Digital Brix Refractometer,3 in 1-Brix,TDS & Salinity,Sugar Meter Range 55% Accuracy ± 0.1% Multi-function & Upgraded OLED display:Test sugar,salinity,coffee tds, with quick results on a bright OLED display Save & Share Data:Our refractometer can be link to DiFluid APP to save and share test data Rapid Charging: Fully charge in 1 hour with up to 30 days of standard use in one charge High Precision:Range 55%, accuracy ±0.1%, resolution ±0.05%, with ATC for even higher accuracy, 2S to get results Waterproof & Durable:IP67 waterproof & drop resistant,more easy to use and clean