5in1 Water Quality Tester PH SALT Total Dissolved Solids EC Temperature Test Meter Multi-functional Mariculture Tester for Drinking Water Aquarium Aquaculture Swimming Pool Name: Water Quality Tester Material: ABS Battery: 3 * 1.5V LR44 button cell (not included) Display: LCD Backlight Display Measurement ranges:  PH: 0.00-14.00PH, 0.01pH resolution, ±0.05pH accuracy Total Dissolved Solids: 0-10000ppm,10.1-200.0 ppt; 1ppm/0.1ppt resolution, ±2% F.S accuracy SALT: 0-20%, 0-10000ppm,10.1-200.0 ppt; 1ppm/0.1ppt/0.1% resolution, ±2% F.S accuracy EC: 0-10000μS/c-m, 1us/c-m resolution, ±2%FS accuracy Temperature: 0.0℃-60.0℃ (32℉-140℉) Calibration:  pH: pH4.01/pH6.86/pH9.18(Priority calibration of pH6.86  EC/Total Dissolved Solids/SALT: 1413us/c-m;1382ppm(mg/L) 35PPT Work environment: 0-60℃ (32.0-140°F); 100%RH  Waterproof: IP66 Automatic shut-off: 135 seconds Item size: 183 * 42 * 42mmmm / 7.20 * 1.65 * 1.65in Package size: 235 * 90 * 40mm / 9.25 * 3.54 * 1.57in Package weight: 160g / 5.64ounce