" TDS water quality test pen in hand, always pay attention to the condition of your water quality. Model: A46 Measuring range: 0-9990ppm (the range exceeding 999 will be displayed on the back * 10, and the reading should be multiplied by 10) Battery: 1.5V (LR44) * 2PcS battery Send 4 x 1.5V button batteries (model: LR44), a total of 6 batteries, each two batteries can be used for at least 3 months, and the cumulative can be used for more than 9 months. Error range: ± 2% Temperature range: 0 ~ 60 ° °C Product weight: 78 grams Size: 155 * 31 * 23 (mm) Note: The size is measured manually, there may be some errors Instructions for use: TDS water quality test pen in hand, always pay attention to the condition of your water quality Water Quality Test Operation Instructions (TDS Test Value): 1. Remove the pen cap and turn on the on / off switch 2. Insert the pen into the test solution up to the water level position and swirl gently to remove bubbles in the pen. 3. Once the reading is
