FEATURE: 1. Lightweight and portable.2. Accurately measure the amount of water to protect the drinking water health of the whole family.3. Multi-function random switch4. Dust-proof and splash-proof design: IP67 waterproof level5. LCD backlit screen, clear and easy to read6. Built-in high-sensitivity electrode head, using high-sensitivity glass electrode, anti-rust platinum electrodeSPECIFICATION:Measuring range: PH/ORP/EC/TEMP/SALT/S.G/TDSBattery: 3*1.5V button battery (built-in)Material: PlasticSize: Approx 185*37*24mm/7.29*1.46*0.95inch.Weight: 0.15kgMEASURING RANGE: 1. EC:Range：0-10000us / cm，10.01- 19.99mS / cm，20.1400.0mS / cm（Automatic conversion range） Resolution：1uS / cm；0.1ms/cm;Accuracy：±2％FS2. TDS：Range：0-10000ppm，10.1-20.0ppt（Automatically convert range） Resolution：1ppm；0.1Accuracy：±2％FS3.Salinity：Range：0.01％-25.00％Resolution：0.01％Accuracy：0.01-5.00％（±0.1％）; 5.1-25.0％（±1％）4.PH ValueRange：0.01-14.00рHResolution：0.01pHAccuracy：±0.05 pH5. ORP：Range: ±999mVResolution：1mvAccuracy：±2mv6. SG：1.000 -1.222Working environment：0-60.0Celsius（32.0-140Fahrenheit）; Relative humidity 100%7. TemperatureRange：0.1-60.0Celsius 32.0-140FahrenheitAccuracy：±0.5CelsiusResolution：0.1Celsius /FahrenheitPACKAGE INCLUDED:1X 7 in 1 water quality penNOTE:PO BOX address is not supported, please provide the correct physical addressATTENTION:If the customer change their mind and want to cancel the order, please contact us within 2-3 hours after placing the order. Or, once the package is dispatched, we won't be able to intercept packages in transit. Please understand.