Features1The pen electrode can be directly inserted into the mouth of the drinking bottle for measurement, and the pen lid can also be used as a container for the liquid to be tested, which is convenient to use. 2Fast measurement.Because of the exquisite sensor elements, a measurement can be completed in 5 seconds. 3Automatic temperature compensation, the water quality monitor can automatically convert the indicated value to the indicated value at 25 degrees. 4Easy to clean, the electrode protective cover can be removed for cleaning the probe and the sheath. 5The operating temperature is 0 to 50 degrees celsius, and the detection range of total dissolved solids is 0 to 4999ppm.SpecificationItem Type: Water Quality TesterMaterial: Plastic Product Size: Approx.16.5 x 3cm / 6.5 x 1.2inBattery Type: CR2032 Button BatteryBattery Model: DC3VBattery Capacity: 230mAh (Shipped with Built in Battery)Total Dissolved Solids Detection Range: 0 to 4999ppmTest Accuracy: 2%Temperature Detection Range: 0 to 99 (32 to 212)Use Environment: 0 to 50 Maximum Relative Humidity 95%Material: PlasticUses: Suitable for Water Quality Testing in the Water Treatment Industry, Water Industry, Family, Home Travel, Field Operations, Swimming Pools, Etc.Weight: Approx.72g / 2.5ozPackage List1 xWater Quality Tester 1 x User Manual 1 x Storage Bag