Description/Features: 1. Simple to use, insert the probe into the measured water, you can know the quality of water, convenient to use . 2. Fast and accurate readings.Large LCD display makes it easy to read. 3. Handheld pen style makes it conveniently fits in your pocket or bag.Can test purity of the water quality at any time. 4. Made of ABS plastic, and .Waterproof design, lower power procesor. 5.Accurate & Reliable: Provides precise readings to your water is perfectly balanced and safe. Specifications: Material: ABS Color: As shown Product name: TDS water quality test pen Working temperature: 0°C-80°C (32°F-176°F) Detection range: TDS: 0-9990PPM Battery type: 2x1.5v (button battery) (Not included) Accuracy: ±2% Calibration method: automatic calibration Maintenance: After the test, dry the water and keep the motor clean. If it is not used for a long time, please remove the battery and cover the electrode protective cover Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 x Water quality detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.