Features: -Made of new high-quality materials, it is durable, corrosion-resistant and can be used for a long time. -The detection water temperature range is 5~45℃, the measurement results are accurate, and the response is sensitive and rapid. -The use method is simple, and the test results are directly displayed on the screen, which is convenient and quick. -Small and lightweight, easy to carry, can be used for drinking water testing. -The TOC COD TDS is a 3-in-1 design that measures the level of contamination of organics by water, chemical oxygen demand and total dissolved solids. Specification: Condition: 100% Brand New Material: Plastic Battery capacity: 200mAH Lithium 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 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. Features Made of new high-quality materials, it is durable, corrosion-resistant and can be used for a long time. The detection water temperature range is 5~45℃, the measurement results are accurate, and the response is sensitive and rapid. The use method is simple, and the test results are directly displayed on the screen, which is convenient and quick. Small and lightweight, easy to carry, can be used for drinking water testing. The TOC COD TDS is a 3-in-1 design that measures the level of contamination of organics by water, chemical oxygen demand and total dissolved solids.