Feature 1LCD Display: The large, easy to read LCD screen includes simultaneous temperature readings for your convenience. 2Automatic Temperature Compensation: Three different nonlinear EC to TDS conversion factors (KCl, 442TM, NaCl), automatic temperature compensation using three temperature coefficients. 3Multi Function: Automatic shutdown function, data hold function and low battery indicator, multi function, simple operation. 4IP67 Waterproof: Digital calibration (button) to any point within the meter range, IP67 rated waterproof housing, not afraid of damage to the inner core. 5Four Scales: Portable water tester is made of sturdy ABS material, wear resistant and durable, and the four scales are S, mS, ppm, ppt.Item Type: 4 in 1 Water Quality Test PenMaterial: ABSWeight: Approx. 168g / 5.9ozEC Range: 0 to 9990 S; 0 to 9.99 mSTDS Range: 0 to 8560 ppm (mg/L)PH range: 0.0-14.0 pHTemperature Range: 0.1 to 50C; 32 to 122FResolution: PH :0.1 pHEC: 0-999: 1 S; 1000-9990: 10 S; 0-9.99mS: 0.01mSTDS: 0-999: 1ppm/1000-9990: 10ppmTemperature: 0.1 C/FAccuracy: PH :+/- 0.1%EC/TDS: +/- 2%Temperature: +/- 1% C/FProbe: Detachable Platinum ElectrodeHousing: IP67 WaterproofBattery: AAAx2 (Not Included)Uses: Ideal for Testing Water, Swimming Pools, Aquariums, Spas, Hydroponics, Food, Wine and Beer Making, Etc. .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 Water Quality Test Pen1 xLanyard1 x User Manual3 x Detection Powder Pack