Specification: Condition: 100% Brand New Material: Plastic Battery capacity: 200mAH Li battery model: 18650 Detection water temperature range: 5~45°C Input: 5V, 1A Operating temperature range: 10~40°C Weight: Approx. 237g / 8.4oz Product Size: Approx. 92x52x52mm / 3.6x2.0x2.0in Package List: 1 x Tester 1 x USB Cable 1 x Instruction Manual 5 x Cotton Swabs Tips: TOC: Total organic carbon is a term used to describe organic (carbon-containing organic) contaminants in water systems, so it fully reflects the degree of contamination of organic matter by water. COD: Chemical oxygen demand, the amount of oxidant consumed when a certain strong oxidant is used to treat the water sample. It is an indicator of how much reducing substances are present in the water. The greater the chemical oxygen demand, the more serious the water is contaminated by organic matter. TDS: The total dissolved solids, that is, the measured value of the amount of inorganic substances (sodium, calcium, etc.) in water, the higher the TDS value, the more dissolved matter contained in the water. Note: 1.Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Features The detection water temperature range is 5~45°C, the measurement result is accurate, and the reaction is sensitive and rapid Made from new high-quality materials, it is durable, corrosion-resistant and can be used for a long time The TOC COD TDS is a three-in-one design that measures the degree of contamination of organic matter with water, chemical oxygen demand and total dissolved solids Compact and lightweight, it is easy to carry and can be used for drinking water testing The method of use is simple, and the test result is directly displayed on the screen, which is convenient and quick