1The pen electrode can be directly inserted into the mouth of the drinking bottle for measurement, and the pen cap can also be used as a container for the liquid to be tested, which is convenient to use. 2The automatic temperature compensation function can automatically convert the indicated value to the indicated value at 25C. 3The measurement is fast. Due to the exquisite sensor elements, a measurement can be completed in 5 seconds. 4Easy to clean, the electrode protective cover can be removed for cleaning the probe and the sheath. 5Compact in size, portable, light in weight and easy to carry around, convenient to use.Item Type: TDS/EC MeterMaterial: ABSColor: As shown in the pictureWeight: Approx.56g/2ozBattery: CR2032 button battery 230mAh (included)TDS Detection Range: 0-9999ppmEC: 0s/cm-9999s/cmAccuracy: 2%F.STemperature Detection Range: 0-99 (32-212)Use Environment: 0-50 maximum relative humidity 95%How to Use1. Take off the pen cover and turn on the switch.2. Put the pen into the solution to be tested, the height of the solution should not exceed 4cm (from the end of the pen).3. Gently stir the pen in the solution to be tested for a few times, and wait for the reading to stabilize.4. After use, wipe off the water in the pen tip with a cloth, and put the pen back into the pen cover.1 x TDS/EC Meter1 x Instruction Manual1 x Pack Cover1.Avoid immersing the entire TDS pen in water.2.Avoid high temperature and direct light.3.Avoid impact, heavy pressure or falling.