☕ 【High Precision Refractometer】Range: 0-30% TDS; Precision: ±0.02% TDS; Resolution 0.01%; Accuracy: ±0.03% TDS; Temperature range: 5℃-40℃(41℉-104℉). ☕ 【3 Modes】Three testing modes: Standard test, Multi-test and Auto-test. DiFluid R2 Extract helps your test more accurate. HD LCD screen display is easy to read. ☕ 【Rechargeable】Type-C smart fast charging, fast charging, long battery life. Built-in 430mAh lithium battery, fully charged within 2 hours, last for 30 days of standard use. ☕ 【IP67 Waterproof】IP67 waterproof and dust resistant, easy to use and simply rinse the sample dish under running wtaer and wipe dry. The charging port is not waterproof. ☕ 【DiFluid Café APP】Share recipes, data and insights, guiding you brew a perfect cup. Share the brew data for others to bulid from, help the community improve together.