[5-in-1 pH METER] - Meter has a five-in-one function, which can measure PH, TDS, EC (Electrical Conductivity), Salinity , Salinity ppm, and Temperature - with high precision every time. All-round measurement of water quality to consistent results. [TDS Measurement] - Fast and accurate TDS / PPM testing for hydroponics or anywhere TDS is critical. The TDS Range is 0~10,000ppm. Accuracy is ±2%. [Saline and Saline ppm Measurement] - Conveniently and easily keep track of saline levels by either percentage or ppm. Great for aquarium, saltwater pools, saltwater spas or anywhere salt levels are critical. Numerous Applications] - This meter can measure TDS, EC, and pH in fresh water situations, and can measure Salinity and Salinity ppm in saltwater situations, such as saltwater pools, spas and aquariums. It can also be used to measure drinking water, RO System, spa, soap mixtures, food, wine, beer or any other liquids. [High-Definition Backlight] - Clear Display Even At Night Measurement accuracy: PH: 0.05ph SALT: ±1% Measuring range: 0-10000us/cm 0-14ph 10.1-200.0ppt Measurement accuracy: PH: 0.05ph SALT: ±1% TDS&EC ±2% Resolution: 1ppm 1us/cm 0.01ph 0.01% Colour:Green Material:ABS Package Contents: 1 x Water quality testing pen 1 x Instructions in Chinese and English Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.